20409615

素因数分解:

$3^2\times 5^1\times {\mathrm{647}}^1\times {\mathrm{701}}^1$

素因数の和:1359

約数の個数: 24

約数和(自身を含む): 35481888

約数和(自身を除く): 15072273

約数列:

[1, 3, 5, 9, 15, 45, 647, 701, 1941, 2103, 3235, 3505, 5823, 6309, 9705, 10515, 29115, 31545, 453547, 1360641, 2267735, 4081923, 6803205, 20409615]

約数ペア:

[(1, 20409615), (3, 6803205), (5, 4081923), (9, 2267735), (15, 1360641), (45, 453547), (647, 31545), (701, 29115), (1941, 10515), (2103, 9705), (3235, 6309), (3505, 5823)]