31913680

素因数分解:

$2^4\times 5^1\times {\mathrm{398921}}^1$

素因数の和:398934

約数の個数: 20

約数和(自身を含む): 74199492

約数和(自身を除く): 42285812

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 398921, 797842, 1595684, 1994605, 3191368, 3989210, 6382736, 7978420, 15956840, 31913680]

約数ペア:

[(1, 31913680), (2, 15956840), (4, 7978420), (5, 6382736), (8, 3989210), (10, 3191368), (16, 1994605), (20, 1595684), (40, 797842), (80, 398921)]