20639525

素因数分解:

$5^2\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{421}}^1$

素因数の和:521

約数の個数: 24

約数和(自身を含む): 26844264

約数和(自身を除く): 6204739

約数列:

[1, 5, 25, 37, 53, 185, 265, 421, 925, 1325, 1961, 2105, 9805, 10525, 15577, 22313, 49025, 77885, 111565, 389425, 557825, 825581, 4127905, 20639525]

約数ペア:

[(1, 20639525), (5, 4127905), (25, 825581), (37, 557825), (53, 389425), (185, 111565), (265, 77885), (421, 49025), (925, 22313), (1325, 15577), (1961, 10525), (2105, 9805)]