31781020

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{22381}}^1$

素因数の和:22461

約数の個数: 24

約数和(自身を含む): 67683168

約数和(自身を除く): 35902148

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 22381, 44762, 89524, 111905, 223810, 447620, 1589051, 3178102, 6356204, 7945255, 15890510, 31781020]

約数ペア:

[(1, 31781020), (2, 15890510), (4, 7945255), (5, 6356204), (10, 3178102), (20, 1589051), (71, 447620), (142, 223810), (284, 111905), (355, 89524), (710, 44762), (1420, 22381)]