21656780

素因数分解:

$2^2\times 5^1\times {\mathrm{103}}^1\times {\mathrm{10513}}^1$

素因数の和:10625

約数の個数: 24

約数和(自身を含む): 45925152

約数和(自身を除く): 24268372

約数列:

[1, 2, 4, 5, 10, 20, 103, 206, 412, 515, 1030, 2060, 10513, 21026, 42052, 52565, 105130, 210260, 1082839, 2165678, 4331356, 5414195, 10828390, 21656780]

約数ペア:

[(1, 21656780), (2, 10828390), (4, 5414195), (5, 4331356), (10, 2165678), (20, 1082839), (103, 210260), (206, 105130), (412, 52565), (515, 42052), (1030, 21026), (2060, 10513)]