12879990140

素因数分解:

$2^2\times 5^1\times {\mathrm{643999507}}^1$

素因数の和:643999516

約数の個数: 12

約数和(自身を含む): 27047979336

約数和(自身を除く): 14167989196

約数列:

[1, 2, 4, 5, 10, 20, 643999507, 1287999014, 2575998028, 3219997535, 6439995070, 12879990140]

約数ペア:

[(1, 12879990140), (2, 6439995070), (4, 3219997535), (5, 2575998028), (10, 1287999014), (20, 643999507)]