20013885

素因数分解:

$3^4\times 5^1\times {\mathrm{49417}}^1$

素因数の和:49434

約数の個数: 20

約数和(自身を含む): 35877468

約数和(自身を除く): 15863583

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 49417, 148251, 247085, 444753, 741255, 1334259, 2223765, 4002777, 6671295, 20013885]

約数ペア:

[(1, 20013885), (3, 6671295), (5, 4002777), (9, 2223765), (15, 1334259), (27, 741255), (45, 444753), (81, 247085), (135, 148251), (405, 49417)]