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1 GO

2 1 a σ(a) σ(a) = 2a, 6,28,496, = 2 (2 2 1), 28 = 2 2 (2 3 1), 496 = 2 4 (2 5 1), 8128 = 2 6 (2 7 1) 2 1 Q = 2 e+1 1 a = 2 e Q (perfect numbers ) Q = 2 e+1 1 Q

3 2 e+1 1 e + 1 Q = 2 e+1 1, e + 1 a = 2 e Q (weakly perfect numbers)

4 Table 1 P = 2 : p Q = 2 p 1 a: 2 (3) (7) (31) (127) * (2047) 23* (8191) (131071) (524287) * ( ) 47* * ( ) 233*1103* ( ) *

5 2 m m q = 2 e m : a = 2 e q m σ(a) = 2a m Table 2 [P = 2, m = 2] ;2 a a = 2 e q, q :

6 3 2 e q a = 2 e 1 q (half perfect numbers) q = 2 e m : a = 2 e q m a = 2 e 1 q m

7 a = 2 e 1 q, σ(a) = σ(2 e 1 q) = (2 e 1)(q+1) = (2 e 1)q+2 e 1 = 2a q+2 e 1 q = 2 e m 2σ(a) = 4a 2q+2 e+1 2 = 4a 2q+q+1 m 2 = 4a q m 1 Maxp(a) a 2σ(a) = 4a Maxp(a) m 1

8 4 q = 2 e m : a = 2 e q m ( perfect numbers) a = 2 e+1 q m (double perfect numbers) a = 2 e+1 q, σ(a) = σ(2 e+1 q) = (2 e+2 1)(q+1) = (2 e+1 1)q+2 e+2 1 = 2a q+2 e+2 1 q = 2 e m σ(a) = 2a + Maxp(a) 2m + 1

9 m, m

10 5 51 P = 2, m = 0 σ(a) = 2a σ(a) = 2a a a = 2 e q, (q = 2 e+1 1:,) (Euler) a a, m = 0

11 σ(a) = 2a + Maxp(a) + 1 Table 3 [P = 2, m = 0] a

12 12 = 2 2 3, 56 = 2 3 7, 992 = , = ( ), : 66 = , 3230 = = = = = =

13 get, 100 get get get, get

14 s(a) 3 s(a) = 2, a = p e q f, p < q :, X = p e, Y = q f ρ = pq, σ(a) = 2a + Maxp(a) + 1 (px 1)(qY 1) = 2ρ XY + (q + 1)ρ XY R R = pq 2ρ = (p 2)(q 2) + 2 px qy RXY = (q + 1)ρ R 0 p = 2, R = 2, ρ = q 2X qy XY = (q + 1)q

15 f = 1 Y = q 2X q Xq = (q + 1)q = q 2 1 2X(q 1) + 1 = q q 2 q 1 2 e = X = q + 1 q = 2 e 1, a = 2 e q a f 2 Y q 2 Y (2X q) = 2X 1 + q 2 1 q 2 (2X q) 2X q > 0 ξ = 2X q Y (2X q) = Y ξ = 2X 1 + q 2 1 = ξ + q 2 + q 2 ξ = 1

16 52 a = 2 e qr, (r < q : ) q = Maxp(a) σ(a) = 2a + q + 1 a = 2 e qr, (r < q : ) σ(a) = (2 e+1 1) q r 2a + q + 1 = 2 e+1 qr + q + 1 (2 e+1 1) q r = 2 e+1 qr + q + 1 (2 e+1 )( q r qr) = q r + q + 1 = q + r (2 e+1 )( + 1) = qr q + 1 = q r + + 2

17 , q r = 2 e+1 ( + 1) 2 = + 1 = q + r q r = (2 e+1 1) 1 N 0 = 2 e+1 1 q r = N 0 1 q 0 = q N 0, r 0 = r N 0 q 0 r 0 = N0 2 1 D = N0 2 1 q 0 r 0 = D

18 e = 1, 2, 3,, N 0, D q 0 r 0 = D, q = q 0 + N 0, r = r 0 + N 0 1 a = a = e < 10

19 2 66 = , = a = 2 e qr, (r < q : ), 2 66, get

20 55?- all_nee1(0,0) n=8 $a=2^1*3*11$ 66 a=66 true 56?- all_nee1(1,0) n=48 true 57?- all_nee1(2,0) n=224 true 58?- all_nee1(3,0) n=960

21 53 a = 2 5 qr, (r < q : ) q = Maxp(a) σ(a) = 2a + q + 1 a = 2 5 qr, (r < q : ), σ(a) = 18 q r, 2a + q + 1 = 20qr + q + 1 = 18(qr + q + 1) 18 q r = 20qr + q + 1 = q + r 18 q r = 18(qr + + 1) = 20qr + q + 1

22 2(qr 9 9) = q + 1 q 0 = q 9, r 0 = r 9 q 0 r 0 = qr q 0 r 0 = qr (q 0 r 0 90) = q + 1 = q = q 0 (2r 0 + 1) q 0 :, 2r 0 +1 > 2 :, 170 = = ) 2r = 5, 2)2r = 17, 3)2r = 5 17

23 1) 2r = 17, q 0 = 10; q = 19, r = r = 17 a = ) 2r = 5, q 0 = 34 q = 43, 2r = 5; r 0 = 2, r = 11 a = ) 2r = 5 17 = 85, q 0 = 2 q = 11, r 0 = 42; r = 51 a = ,a = get a = 3 e rq

24 54 a = qr, (7 r < q : ) σ(a) = 2a + q + 1 a = qr, (r < q : ), = r + q σ(a) = 13 6 q r = 13 6 (rq+ +1), 2a+q+1 = 90rq+q (rq + + 1) = 90rq + q rq + q + 1 = 78( + 1) q r q 11

25 r 0 = r 7, q 0 = q = (12r 77)q 78 = (12r 0 + 7)q 78(r 0 + 7) (12r 0 + 7)q = (12r 0 + 7)(q ) = (12r 0 + 7)q r = 546 = q 0 (12r 0 + 7) + 54r 0 r 0 a) r 0 = = 7q 0 q 0 = 78; q = 89, r = 7 a = b) r 0 = = 31q c) r 0 = = q 0 (48 + 7) q 0 = 6; q = 17, r = 11 a =

26 = get

27 Table 4 [P = 2, m = 0] a

28 2σ(a) = 4a Maxp(a) 1 3,14 = 2 7,248 = , 4064 = : 1155 = , ( ) = , s(a) = 4, 5

29 s(a) 3 s(a) = 2, a = p e q f, p < q :, X = p e, Y = q f ρ = pq, 2σ(a) = 4a Maxp(a) 1 q = Maxp(a) 2(pX 1)(qY 1) = ρ (4XY (q + 1)) XY R R = 2pq 4ρ = 2( (p 2)(q 2) + 2) px qy RXY = (q + 1)ρ R 0 p = 2, R = 4, ρ = q

30 6 P = 2, m = 2

31 61 [P = 2, m = 2] 2σ(a) = 4a Maxp(a) 3 Table 5 [P = 2, m = 2] a

32 : 130 = = = = a = 2 e qr, 2 e q 2 r, 2 e q 2 r 2, 2 2 r 1 r 2 q

33 62 [P = 2, m = 2] m = 2, σ(a) = 2a + Maxp(a) 3 500, 1)s(a) = 1, a = 2 e, 2) s(a) = 2, a = 2 q,3) a = 2 e qr, r < q : 1)s(a) = 1, a = 2 e, 2) s(a) = 2, a = 2 q 3) a = 2 e qr, r < q : get

34 Table 6 [P = 2, m = 2] a

35 49?- all_nee1(1,2) n=52 $a=2^2*19*11$ 836 a=836 $a=2^2*7*59$ 1652 a=1652 true 50?- all_nee1(2,2) $a=2^1*5*7$ 70 a=70 n=228 $a=2^3*71*19$ a=10792 true 51?- all_nee1(3,2) n=964 true

36 $a=2^6*4159*131$ a= $a=2^6*163*563$ a=

37 63 σ(a) = 2a+Maxp(a) 3 1) a = 2 e a = 2 e,σ(a) = 2 e+1 1, 2a + Maxp(a) 3 = 2 2 e = 2 e+1, a = 2 e, p :,a = p e σ(a) = 2a + Maxp(a) 3 σ(a) = pe+1 1 2a + Maxp(a) 3 = 2 p e + p 3 p, p e+1 1 = (2 p e + p 3)(p 1)

38 p(p 4) + p e (p 2) + 4, p = 2 (p 2)(p 2 + p 2) = 0 2) a = 2 e q σ(a) = (2 e+1 )(q + 1), 2a + q 3 = 2 e+1 + q 3, 2 e+1 = 2q 2 q = 2 e + 1 :

39 2XY 2X qy + 1 = q(q 3) 2)* a s(a) = 2 a = p e q f, (p < q : ),, X = p e, Y = q f, ρ = pq (px 1)(qY 1) a = XY, σ(a) = = 2XY +q 3 R XY RXY px qy + 1 = ρ (q 3), R > 0 R = P q 2ρ = 2 p 0 q 0, (p 0 = p 2, q 0 = q 2) R > 0 p 0 = 0, p = 2, R = 2 ρ

40 Y = q; (f = 1) 2Xq 2X q = q(q 3) 2Xq 2X q = 2Xq q q 1 2X q 1 = q 3 q = X + 1 = 2 e + 1 : a = 2 e q m = 2, Y = q f ; (f 2) 2XY 2X qy + 1 = q(q 3), (2X q)y = 2X 1 = q(q 3) ξ = 2X q 1 ξy = 2X 1 + q(q 3) 2X 1 = q(q 3) = ξ + q(q 2)

41 q 2 4q + 3 ξq 2 q 2

42 3) a = 2 e qr, (r < q : ) q = q + 1, r = r + 1, σ(a) = (2 e+1 1) q r = 2 e+1 q r q r = 2a + q 3 = q + r 2 e+1 ( + 1) (qr + + 1) = q 3 r, 2 e+1 ( + 1) = (qr + + 1) + q 3 = q r + q + r 3 N = 2 e+1 1 q r = (q+ r)n +3, q 0 = q N, r 0 = r N D = N 2 +3 q 0 r 0 = D

43 a = , a=836 a = , a=1652 a = , a=10792 a = , a= a = , a= a = , a=

44 q > r 70 = 2 7 5, 413 = , = , a = =

Go a σ(a). σ(a) = 2a, 6,28,496, = 2 (2 2 1), 28 = 2 2 (2 3 1), 496 = 2 4 (2 5 1), 8128 = 2 6 (2 7 1). 2 1 Q = 2 e+1 1 a = 2

Go a σ(a). σ(a) = 2a, 6,28,496, = 2 (2 2 1), 28 = 2 2 (2 3 1), 496 = 2 4 (2 5 1), 8128 = 2 6 (2 7 1). 2 1 Q = 2 e+1 1 a = 2 Go 2016 8 26 28 8 29 1 a σ(a) σ(a) = 2a, 6,28,496,8128 6 = 2 (2 2 1), 28 = 2 2 (2 3 1), 496 = 2 4 (2 5 1), 8128 = 2 6 (2 7 1) 2 1 Q = 2 e+1 1 a = 2 e Q (perfect numbers ) Q = 2 e+1 1 Q 2 e+1 1 e + 1 Q

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