21815692420

素因数分解:

$2^2\times 5^1\times {\mathrm{1090784621}}^1$

素因数の和:1090784630

約数の個数: 12

約数和(自身を含む): 45812954124

約数和(自身を除く): 23997261704

約数列:

[1, 2, 4, 5, 10, 20, 1090784621, 2181569242, 4363138484, 5453923105, 10907846210, 21815692420]

約数ペア:

[(1, 21815692420), (2, 10907846210), (4, 5453923105), (5, 4363138484), (10, 2181569242), (20, 1090784621)]