20406640

素因数分解:

$2^4\times 5^1\times {\mathrm{255083}}^1$

素因数の和:255096

約数の個数: 20

約数和(自身を含む): 47445624

約数和(自身を除く): 27038984

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 255083, 510166, 1020332, 1275415, 2040664, 2550830, 4081328, 5101660, 10203320, 20406640]

約数ペア:

[(1, 20406640), (2, 10203320), (4, 5101660), (5, 4081328), (8, 2550830), (10, 2040664), (16, 1275415), (20, 1020332), (40, 510166), (80, 255083)]