215791640

素因数分解:

$2^3\times 5^1\times {\mathrm{821}}^1\times {\mathrm{6571}}^1$

素因数の和:7403

約数の個数: 32

約数和(自身を含む): 486196560

約数和(自身を除く): 270404920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 821, 1642, 3284, 4105, 6568, 6571, 8210, 13142, 16420, 26284, 32840, 32855, 52568, 65710, 131420, 262840, 5394791, 10789582, 21579164, 26973955, 43158328, 53947910, 107895820, 215791640]

約数ペア:

[(1, 215791640), (2, 107895820), (4, 53947910), (5, 43158328), (8, 26973955), (10, 21579164), (20, 10789582), (40, 5394791), (821, 262840), (1642, 131420), (3284, 65710), (4105, 52568), (6568, 32855), (6571, 32840), (8210, 26284), (13142, 16420)]