21351920

素因数分解:

$2^4\times 5^1\times {\mathrm{266899}}^1$

素因数の和:266912

約数の個数: 20

約数和(自身を含む): 49643400

約数和(自身を除く): 28291480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 266899, 533798, 1067596, 1334495, 2135192, 2668990, 4270384, 5337980, 10675960, 21351920]

約数ペア:

[(1, 21351920), (2, 10675960), (4, 5337980), (5, 4270384), (8, 2668990), (10, 2135192), (16, 1334495), (20, 1067596), (40, 533798), (80, 266899)]