20431665

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{10559}}^1$

素因数の和:10613

約数の個数: 24

約数和(自身を含む): 36241920

約数和(自身を除く): 15810255

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 10559, 31677, 52795, 95031, 158385, 454037, 475155, 1362111, 2270185, 4086333, 6810555, 20431665]

約数ペア:

[(1, 20431665), (3, 6810555), (5, 4086333), (9, 2270185), (15, 1362111), (43, 475155), (45, 454037), (129, 158385), (215, 95031), (387, 52795), (645, 31677), (1935, 10559)]