79997020

素因数分解:

$2^2\times 5^1\times {\mathrm{3999851}}^1$

素因数の和:3999860

約数の個数: 12

約数和(自身を含む): 167993784

約数和(自身を除く): 87996764

約数列:

[1, 2, 4, 5, 10, 20, 3999851, 7999702, 15999404, 19999255, 39998510, 79997020]

約数ペア:

[(1, 79997020), (2, 39998510), (4, 19999255), (5, 15999404), (10, 7999702), (20, 3999851)]