656012020

素因数分解:

$2^2\times 5^1\times {\mathrm{2459}}^1\times {\mathrm{13339}}^1$

素因数の和:15807

約数の個数: 24

約数和(自身を含む): 1378288800

約数和(自身を除く): 722276780

約数列:

[1, 2, 4, 5, 10, 20, 2459, 4918, 9836, 12295, 13339, 24590, 26678, 49180, 53356, 66695, 133390, 266780, 32800601, 65601202, 131202404, 164003005, 328006010, 656012020]

約数ペア:

[(1, 656012020), (2, 328006010), (4, 164003005), (5, 131202404), (10, 65601202), (20, 32800601), (2459, 266780), (4918, 133390), (9836, 66695), (12295, 53356), (13339, 49180), (24590, 26678)]