20989288

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{154333}}^1$

素因数の和:154356

約数の個数: 16

約数和(自身を含む): 41670180

約数和(自身を除く): 20680892

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 154333, 308666, 617332, 1234664, 2623661, 5247322, 10494644, 20989288]

約数ペア:

[(1, 20989288), (2, 10494644), (4, 5247322), (8, 2623661), (17, 1234664), (34, 617332), (68, 308666), (136, 154333)]