21130915

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{1471}}^1$

素因数の和:1519

約数の個数: 24

約数和(自身を含む): 29092608

約数和(自身を除く): 7961693

約数列:

[1, 5, 13, 17, 65, 85, 169, 221, 845, 1105, 1471, 2873, 7355, 14365, 19123, 25007, 95615, 125035, 248599, 325091, 1242995, 1625455, 4226183, 21130915]

約数ペア:

[(1, 21130915), (5, 4226183), (13, 1625455), (17, 1242995), (65, 325091), (85, 248599), (169, 125035), (221, 95615), (845, 25007), (1105, 19123), (1471, 14365), (2873, 7355)]