399402680

素因数分解:

$2^3\times 5^1\times {\mathrm{9985067}}^1$

素因数の和:9985078

約数の個数: 16

約数和(自身を含む): 898656120

約数和(自身を除く): 499253440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 9985067, 19970134, 39940268, 49925335, 79880536, 99850670, 199701340, 399402680]

約数ペア:

[(1, 399402680), (2, 199701340), (4, 99850670), (5, 79880536), (8, 49925335), (10, 39940268), (20, 19970134), (40, 9985067)]