20656360

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{821}}^1$

素因数の和:886

約数の個数: 64

約数和(自身を含む): 50602320

約数和(自身を除く): 29945960

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 37, 40, 68, 74, 85, 136, 148, 170, 185, 296, 340, 370, 629, 680, 740, 821, 1258, 1480, 1642, 2516, 3145, 3284, 4105, 5032, 6290, 6568, 8210, 12580, 13957, 16420, 25160, 27914, 30377, 32840, 55828, 60754, 69785, 111656, 121508, 139570, 151885, 243016, 279140, 303770, 516409, 558280, 607540, 1032818, 1215080, 2065636, 2582045, 4131272, 5164090, 10328180, 20656360]

約数ペア:

[(1, 20656360), (2, 10328180), (4, 5164090), (5, 4131272), (8, 2582045), (10, 2065636), (17, 1215080), (20, 1032818), (34, 607540), (37, 558280), (40, 516409), (68, 303770), (74, 279140), (85, 243016), (136, 151885), (148, 139570), (170, 121508), (185, 111656), (296, 69785), (340, 60754), (370, 55828), (629, 32840), (680, 30377), (740, 27914), (821, 25160), (1258, 16420), (1480, 13957), (1642, 12580), (2516, 8210), (3145, 6568), (3284, 6290), (4105, 5032)]