20405540

素因数分解:

$2^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{9029}}^1$

素因数の和:9151

約数の個数: 24

約数和(自身を含む): 43235640

約数和(自身を除く): 22830100

約数列:

[1, 2, 4, 5, 10, 20, 113, 226, 452, 565, 1130, 2260, 9029, 18058, 36116, 45145, 90290, 180580, 1020277, 2040554, 4081108, 5101385, 10202770, 20405540]

約数ペア:

[(1, 20405540), (2, 10202770), (4, 5101385), (5, 4081108), (10, 2040554), (20, 1020277), (113, 180580), (226, 90290), (452, 45145), (565, 36116), (1130, 18058), (2260, 9029)]