78439280

素因数分解:

$2^4\times 5^1\times {\mathrm{980491}}^1$

素因数の和:980504

約数の個数: 20

約数和(自身を含む): 182371512

約数和(自身を除く): 103932232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 980491, 1960982, 3921964, 4902455, 7843928, 9804910, 15687856, 19609820, 39219640, 78439280]

約数ペア:

[(1, 78439280), (2, 39219640), (4, 19609820), (5, 15687856), (8, 9804910), (10, 7843928), (16, 4902455), (20, 3921964), (40, 1960982), (80, 980491)]