20655640

素因数分解:

$2^3\times 5^1\times {\mathrm{516391}}^1$

素因数の和:516402

約数の個数: 16

約数和(自身を含む): 46475280

約数和(自身を除く): 25819640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 516391, 1032782, 2065564, 2581955, 4131128, 5163910, 10327820, 20655640]

約数ペア:

[(1, 20655640), (2, 10327820), (4, 5163910), (5, 4131128), (8, 2581955), (10, 2065564), (20, 1032782), (40, 516391)]