31809080

素因数分解:

$2^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{2557}}^1$

素因数の和:2879

約数の個数: 32

約数和(自身を含む): 71828640

約数和(自身を除く): 40019560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 311, 622, 1244, 1555, 2488, 2557, 3110, 5114, 6220, 10228, 12440, 12785, 20456, 25570, 51140, 102280, 795227, 1590454, 3180908, 3976135, 6361816, 7952270, 15904540, 31809080]

約数ペア:

[(1, 31809080), (2, 15904540), (4, 7952270), (5, 6361816), (8, 3976135), (10, 3180908), (20, 1590454), (40, 795227), (311, 102280), (622, 51140), (1244, 25570), (1555, 20456), (2488, 12785), (2557, 12440), (3110, 10228), (5114, 6220)]