21055640

素因数分解:

$2^3\times 5^1\times {\mathrm{526391}}^1$

素因数の和:526402

約数の個数: 16

約数和(自身を含む): 47375280

約数和(自身を除く): 26319640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 526391, 1052782, 2105564, 2631955, 4211128, 5263910, 10527820, 21055640]

約数ペア:

[(1, 21055640), (2, 10527820), (4, 5263910), (5, 4211128), (8, 2631955), (10, 2105564), (20, 1052782), (40, 526391)]