709382020

素因数分解:

$2^2\times 5^1\times {\mathrm{1621}}^1\times {\mathrm{21881}}^1$

素因数の和:23511

約数の個数: 24

約数和(自身を含む): 1490689368

約数和(自身を除く): 781307348

約数列:

[1, 2, 4, 5, 10, 20, 1621, 3242, 6484, 8105, 16210, 21881, 32420, 43762, 87524, 109405, 218810, 437620, 35469101, 70938202, 141876404, 177345505, 354691010, 709382020]

約数ペア:

[(1, 709382020), (2, 354691010), (4, 177345505), (5, 141876404), (10, 70938202), (20, 35469101), (1621, 437620), (3242, 218810), (6484, 109405), (8105, 87524), (16210, 43762), (21881, 32420)]