21309808

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{102451}}^1$

素因数の和:102472

約数の個数: 20

約数和(自身を含む): 44464168

約数和(自身を除く): 23154360

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 102451, 204902, 409804, 819608, 1331863, 1639216, 2663726, 5327452, 10654904, 21309808]

約数ペア:

[(1, 21309808), (2, 10654904), (4, 5327452), (8, 2663726), (13, 1639216), (16, 1331863), (26, 819608), (52, 409804), (104, 204902), (208, 102451)]