20531721

素因数分解:

$3^1\times 7^1\times {\mathrm{443}}^1\times {\mathrm{2207}}^1$

素因数の和:2660

約数の個数: 16

約数和(自身を含む): 31371264

約数和(自身を除く): 10839543

約数列:

[1, 3, 7, 21, 443, 1329, 2207, 3101, 6621, 9303, 15449, 46347, 977701, 2933103, 6843907, 20531721]

約数ペア:

[(1, 20531721), (3, 6843907), (7, 2933103), (21, 977701), (443, 46347), (1329, 15449), (2207, 9303), (3101, 6621)]