21905907

素因数分解:

$3^1\times {\mathrm{53}}^1\times {\mathrm{311}}^1\times {\mathrm{443}}^1$

素因数の和:810

約数の個数: 16

約数和(自身を含む): 29922048

約数和(自身を除く): 8016141

約数列:

[1, 3, 53, 159, 311, 443, 933, 1329, 16483, 23479, 49449, 70437, 137773, 413319, 7301969, 21905907]

約数ペア:

[(1, 21905907), (3, 7301969), (53, 413319), (159, 137773), (311, 70437), (443, 49449), (933, 23479), (1329, 16483)]