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http://www.referat.ru/pub/item/28291

1, 2, 4, 6, 10, 12, 18, 20, 30, 36, 60. . 1, 2, 3, 4, 5, 6.¥.

. , - , , d = 7, .

. (), . - .

4, (30I - 17) (30j - 23).

7- (10I - 3) (10 j - 7).

8, - (2I + 1) (2 j + 1).

9, - (I + 1) ( j + 1).

, + , . , , .. .

3 .

- , .

2- d=6.

55 77 511 517 713
1 7 13 19 25 31 37 43 49 55 61 67 73 79 85 91 97
57 513 711 519
5 11 17 23 29 35 41 47 53 59 65 71 77 83 89 95 101

1 (6I - 1) (6 j - 1), (6k + 1) (6e +1).

2 (6I + 1) (6 j - 1).

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c d = 30 91 (30- 17) (30- 23), = 1, = 1.

c d = 10 (10- 3) (10- 7), = 2, = 1.

c d = 6 (6+ 1) (6+ 1), = 1, = 2.

c d = 4 (4- 1) (4+ 1), = 2, = 3.

c d = 2 (2+ 1) (2+ 1), = 3, = 6.

c d = 1 (+ 1) (+1), = 6, = 12.