399354080

素因数分解:

$2^5\times 5^1\times {\mathrm{2495963}}^1$

素因数の和:2495978

約数の個数: 24

約数和(自身を含む): 943474392

約数和(自身を除く): 544120312

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 2495963, 4991926, 9983852, 12479815, 19967704, 24959630, 39935408, 49919260, 79870816, 99838520, 199677040, 399354080]

約数ペア:

[(1, 399354080), (2, 199677040), (4, 99838520), (5, 79870816), (8, 49919260), (10, 39935408), (16, 24959630), (20, 19967704), (32, 12479815), (40, 9983852), (80, 4991926), (160, 2495963)]