18131020

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{22111}}^1$

素因数の和:22161

約数の個数: 24

約数和(自身を含む): 39005568

約数和(自身を除く): 20874548

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 22111, 44222, 88444, 110555, 221110, 442220, 906551, 1813102, 3626204, 4532755, 9065510, 18131020]

約数ペア:

[(1, 18131020), (2, 9065510), (4, 4532755), (5, 3626204), (10, 1813102), (20, 906551), (41, 442220), (82, 221110), (164, 110555), (205, 88444), (410, 44222), (820, 22111)]