21204717

素因数分解:

$3^1\times {\mathrm{53}}^1\times {\mathrm{193}}^1\times {\mathrm{691}}^1$

素因数の和:940

約数の個数: 16

約数和(自身を含む): 28997568

約数和(自身を除く): 7792851

約数列:

[1, 3, 53, 159, 193, 579, 691, 2073, 10229, 30687, 36623, 109869, 133363, 400089, 7068239, 21204717]

約数ペア:

[(1, 21204717), (3, 7068239), (53, 400089), (159, 133363), (193, 109869), (579, 36623), (691, 30687), (2073, 10229)]