18708980

素因数分解:

$2^2\times 5^1\times {\mathrm{281}}^1\times {\mathrm{3329}}^1$

素因数の和:3619

約数の個数: 24

約数和(自身を含む): 39440520

約数和(自身を除く): 20731540

約数列:

[1, 2, 4, 5, 10, 20, 281, 562, 1124, 1405, 2810, 3329, 5620, 6658, 13316, 16645, 33290, 66580, 935449, 1870898, 3741796, 4677245, 9354490, 18708980]

約数ペア:

[(1, 18708980), (2, 9354490), (4, 4677245), (5, 3741796), (10, 1870898), (20, 935449), (281, 66580), (562, 33290), (1124, 16645), (1405, 13316), (2810, 6658), (3329, 5620)]