81237820

素因数分解:

$2^2\times 5^1\times {\mathrm{1123}}^1\times {\mathrm{3617}}^1$

素因数の和:4749

約数の個数: 24

約数和(自身を含む): 170798544

約数和(自身を除く): 89560724

約数列:

[1, 2, 4, 5, 10, 20, 1123, 2246, 3617, 4492, 5615, 7234, 11230, 14468, 18085, 22460, 36170, 72340, 4061891, 8123782, 16247564, 20309455, 40618910, 81237820]

約数ペア:

[(1, 81237820), (2, 40618910), (4, 20309455), (5, 16247564), (10, 8123782), (20, 4061891), (1123, 72340), (2246, 36170), (3617, 22460), (4492, 18085), (5615, 14468), (7234, 11230)]