21091640

素因数分解:

$2^3\times 5^1\times {\mathrm{527291}}^1$

素因数の和:527302

約数の個数: 16

約数和(自身を含む): 47456280

約数和(自身を除く): 26364640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 527291, 1054582, 2109164, 2636455, 4218328, 5272910, 10545820, 21091640]

約数ペア:

[(1, 21091640), (2, 10545820), (4, 5272910), (5, 4218328), (8, 2636455), (10, 2109164), (20, 1054582), (40, 527291)]