15978320

素因数分解:

$2^4\times 5^1\times {\mathrm{199729}}^1$

素因数の和:199742

約数の個数: 20

約数和(自身を含む): 37149780

約数和(自身を除く): 21171460

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199729, 399458, 798916, 998645, 1597832, 1997290, 3195664, 3994580, 7989160, 15978320]

約数ペア:

[(1, 15978320), (2, 7989160), (4, 3994580), (5, 3195664), (8, 1997290), (10, 1597832), (16, 998645), (20, 798916), (40, 399458), (80, 199729)]