20065825

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{2129}}^1$

素因数の和:2181

約数の個数: 24

約数和(自身を含む): 27732600

約数和(自身を除く): 7666775

約数列:

[1, 5, 13, 25, 29, 65, 145, 325, 377, 725, 1885, 2129, 9425, 10645, 27677, 53225, 61741, 138385, 308705, 691925, 802633, 1543525, 4013165, 20065825]

約数ペア:

[(1, 20065825), (5, 4013165), (13, 1543525), (25, 802633), (29, 691925), (65, 308705), (145, 138385), (325, 61741), (377, 53225), (725, 27677), (1885, 10645), (2129, 9425)]