20455640

素因数分解:

$2^3\times 5^1\times {\mathrm{511391}}^1$

素因数の和:511402

約数の個数: 16

約数和(自身を含む): 46025280

約数和(自身を除く): 25569640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 511391, 1022782, 2045564, 2556955, 4091128, 5113910, 10227820, 20455640]

約数ペア:

[(1, 20455640), (2, 10227820), (4, 5113910), (5, 4091128), (8, 2556955), (10, 2045564), (20, 1022782), (40, 511391)]