20916008

素因数分解:

$2^3\times {\mathrm{211}}^1\times {\mathrm{12391}}^1$

素因数の和:12608

約数の個数: 16

約数和(自身を含む): 39406560

約数和(自身を除く): 18490552

約数列:

[1, 2, 4, 8, 211, 422, 844, 1688, 12391, 24782, 49564, 99128, 2614501, 5229002, 10458004, 20916008]

約数ペア:

[(1, 20916008), (2, 10458004), (4, 5229002), (8, 2614501), (211, 99128), (422, 49564), (844, 24782), (1688, 12391)]