20809220

素因数分解:

$2^2\times 5^1\times {\mathrm{881}}^1\times {\mathrm{1181}}^1$

素因数の和:2071

約数の個数: 24

約数和(自身を含む): 43786008

約数和(自身を除く): 22976788

約数列:

[1, 2, 4, 5, 10, 20, 881, 1181, 1762, 2362, 3524, 4405, 4724, 5905, 8810, 11810, 17620, 23620, 1040461, 2080922, 4161844, 5202305, 10404610, 20809220]

約数ペア:

[(1, 20809220), (2, 10404610), (4, 5202305), (5, 4161844), (10, 2080922), (20, 1040461), (881, 23620), (1181, 17620), (1762, 11810), (2362, 8810), (3524, 5905), (4405, 4724)]