31997480

素因数分解:

$2^3\times 5^1\times {\mathrm{251}}^1\times {\mathrm{3187}}^1$

素因数の和:3449

約数の個数: 32

約数和(自身を含む): 72303840

約数和(自身を除く): 40306360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 251, 502, 1004, 1255, 2008, 2510, 3187, 5020, 6374, 10040, 12748, 15935, 25496, 31870, 63740, 127480, 799937, 1599874, 3199748, 3999685, 6399496, 7999370, 15998740, 31997480]

約数ペア:

[(1, 31997480), (2, 15998740), (4, 7999370), (5, 6399496), (8, 3999685), (10, 3199748), (20, 1599874), (40, 799937), (251, 127480), (502, 63740), (1004, 31870), (1255, 25496), (2008, 15935), (2510, 12748), (3187, 10040), (5020, 6374)]