20553220

素因数分解:

$2^2\times 5^1\times {\mathrm{421}}^1\times {\mathrm{2441}}^1$

素因数の和:2871

約数の個数: 24

約数和(自身を含む): 43282008

約数和(自身を除く): 22728788

約数列:

[1, 2, 4, 5, 10, 20, 421, 842, 1684, 2105, 2441, 4210, 4882, 8420, 9764, 12205, 24410, 48820, 1027661, 2055322, 4110644, 5138305, 10276610, 20553220]

約数ペア:

[(1, 20553220), (2, 10276610), (4, 5138305), (5, 4110644), (10, 2055322), (20, 1027661), (421, 48820), (842, 24410), (1684, 12205), (2105, 9764), (2441, 8420), (4210, 4882)]