28218905

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{647}}^1$

素因数の和:737

約数の個数: 32

約数和(自身を含む): 40497408

約数和(自身を除く): 12278503

約数列:

[1, 5, 11, 13, 55, 61, 65, 143, 305, 647, 671, 715, 793, 3235, 3355, 3965, 7117, 8411, 8723, 35585, 39467, 42055, 43615, 92521, 197335, 434137, 462605, 513071, 2170685, 2565355, 5643781, 28218905]

約数ペア:

[(1, 28218905), (5, 5643781), (11, 2565355), (13, 2170685), (55, 513071), (61, 462605), (65, 434137), (143, 197335), (305, 92521), (647, 43615), (671, 42055), (715, 39467), (793, 35585), (3235, 8723), (3355, 8411), (3965, 7117)]