20809803

素因数分解:

$3^1\times 7^1\times {\mathrm{449}}^1\times {\mathrm{2207}}^1$

素因数の和:2666

約数の個数: 16

約数和(自身を含む): 31795200

約数和(自身を除く): 10985397

約数列:

[1, 3, 7, 21, 449, 1347, 2207, 3143, 6621, 9429, 15449, 46347, 990943, 2972829, 6936601, 20809803]

約数ペア:

[(1, 20809803), (3, 6936601), (7, 2972829), (21, 990943), (449, 46347), (1347, 15449), (2207, 9429), (3143, 6621)]