18945020

素因数分解:

$2^2\times 5^1\times {\mathrm{281}}^1\times {\mathrm{3371}}^1$

素因数の和:3661

約数の個数: 24

約数和(自身を含む): 39937968

約数和(自身を除く): 20992948

約数列:

[1, 2, 4, 5, 10, 20, 281, 562, 1124, 1405, 2810, 3371, 5620, 6742, 13484, 16855, 33710, 67420, 947251, 1894502, 3789004, 4736255, 9472510, 18945020]

約数ペア:

[(1, 18945020), (2, 9472510), (4, 4736255), (5, 3789004), (10, 1894502), (20, 947251), (281, 67420), (562, 33710), (1124, 16855), (1405, 13484), (2810, 6742), (3371, 5620)]