20913207

素因数分解:

$3^1\times 7^1\times {\mathrm{677}}^1\times {\mathrm{1471}}^1$

素因数の和:2158

約数の個数: 16

約数和(自身を含む): 31936512

約数和(自身を除く): 11023305

約数列:

[1, 3, 7, 21, 677, 1471, 2031, 4413, 4739, 10297, 14217, 30891, 995867, 2987601, 6971069, 20913207]

約数ペア:

[(1, 20913207), (3, 6971069), (7, 2987601), (21, 995867), (677, 30891), (1471, 14217), (2031, 10297), (4413, 4739)]