81016280

素因数分解:

$2^3\times 5^1\times {\mathrm{821}}^1\times {\mathrm{2467}}^1$

素因数の和:3299

約数の個数: 32

約数和(自身を含む): 182582640

約数和(自身を除く): 101566360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 821, 1642, 2467, 3284, 4105, 4934, 6568, 8210, 9868, 12335, 16420, 19736, 24670, 32840, 49340, 98680, 2025407, 4050814, 8101628, 10127035, 16203256, 20254070, 40508140, 81016280]

約数ペア:

[(1, 81016280), (2, 40508140), (4, 20254070), (5, 16203256), (8, 10127035), (10, 8101628), (20, 4050814), (40, 2025407), (821, 98680), (1642, 49340), (2467, 32840), (3284, 24670), (4105, 19736), (4934, 16420), (6568, 12335), (8210, 9868)]