256620325

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{25471}}^1$

素因数の和:25525

約数の個数: 24

約数和(自身を含む): 353755136

約数和(自身を除く): 97134811

約数列:

[1, 5, 13, 25, 31, 65, 155, 325, 403, 775, 2015, 10075, 25471, 127355, 331123, 636775, 789601, 1655615, 3948005, 8278075, 10264813, 19740025, 51324065, 256620325]

約数ペア:

[(1, 256620325), (5, 51324065), (13, 19740025), (25, 10264813), (31, 8278075), (65, 3948005), (155, 1655615), (325, 789601), (403, 636775), (775, 331123), (2015, 127355), (10075, 25471)]