81625640

素因数分解:

$2^3\times 5^1\times {\mathrm{2040641}}^1$

素因数の和:2040652

約数の個数: 16

約数和(自身を含む): 183657780

約数和(自身を除く): 102032140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2040641, 4081282, 8162564, 10203205, 16325128, 20406410, 40812820, 81625640]

約数ペア:

[(1, 81625640), (2, 40812820), (4, 20406410), (5, 16325128), (8, 10203205), (10, 8162564), (20, 4081282), (40, 2040641)]