28657240

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^2\times {\mathrm{37}}^1\times {\mathrm{67}}^1$

素因数の和:149

約数の個数: 96

約数和(自身を含む): 71395920

約数和(自身を除く): 42738680

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 37, 40, 67, 68, 74, 85, 134, 136, 148, 170, 185, 268, 289, 296, 335, 340, 370, 536, 578, 629, 670, 680, 740, 1139, 1156, 1258, 1340, 1445, 1480, 2278, 2312, 2479, 2516, 2680, 2890, 3145, 4556, 4958, 5032, 5695, 5780, 6290, 9112, 9916, 10693, 11390, 11560, 12395, 12580, 19363, 19832, 21386, 22780, 24790, 25160, 38726, 42143, 42772, 45560, 49580, 53465, 77452, 84286, 85544, 96815, 99160, 106930, 154904, 168572, 193630, 210715, 213860, 337144, 387260, 421430, 427720, 716431, 774520, 842860, 1432862, 1685720, 2865724, 3582155, 5731448, 7164310, 14328620, 28657240]

約数ペア:

[(1, 28657240), (2, 14328620), (4, 7164310), (5, 5731448), (8, 3582155), (10, 2865724), (17, 1685720), (20, 1432862), (34, 842860), (37, 774520), (40, 716431), (67, 427720), (68, 421430), (74, 387260), (85, 337144), (134, 213860), (136, 210715), (148, 193630), (170, 168572), (185, 154904), (268, 106930), (289, 99160), (296, 96815), (335, 85544), (340, 84286), (370, 77452), (536, 53465), (578, 49580), (629, 45560), (670, 42772), (680, 42143), (740, 38726), (1139, 25160), (1156, 24790), (1258, 22780), (1340, 21386), (1445, 19832), (1480, 19363), (2278, 12580), (2312, 12395), (2479, 11560), (2516, 11390), (2680, 10693), (2890, 9916), (3145, 9112), (4556, 6290), (4958, 5780), (5032, 5695)]