21285980

素因数分解:

$2^2\times 5^1\times {\mathrm{103}}^1\times {\mathrm{10333}}^1$

素因数の和:10445

約数の個数: 24

約数和(自身を含む): 45138912

約数和(自身を除く): 23852932

約数列:

[1, 2, 4, 5, 10, 20, 103, 206, 412, 515, 1030, 2060, 10333, 20666, 41332, 51665, 103330, 206660, 1064299, 2128598, 4257196, 5321495, 10642990, 21285980]

約数ペア:

[(1, 21285980), (2, 10642990), (4, 5321495), (5, 4257196), (10, 2128598), (20, 1064299), (103, 206660), (206, 103330), (412, 51665), (515, 41332), (1030, 20666), (2060, 10333)]