20867180

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{2551}}^1$

素因数の和:2969

約数の個数: 24

約数和(自身を含む): 43945440

約数和(自身を除く): 23078260

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 2551, 4090, 5102, 8180, 10204, 12755, 25510, 51020, 1043359, 2086718, 4173436, 5216795, 10433590, 20867180]

約数ペア:

[(1, 20867180), (2, 10433590), (4, 5216795), (5, 4173436), (10, 2086718), (20, 1043359), (409, 51020), (818, 25510), (1636, 12755), (2045, 10204), (2551, 8180), (4090, 5102)]