20808548721

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{32564239}}^1$

素因数の和:32564316

約数の個数: 12

約数和(自身を含む): 30480128640

約数和(自身を除く): 9671579919

約数列:

[1, 3, 9, 71, 213, 639, 32564239, 97692717, 293078151, 2312060969, 6936182907, 20808548721]

約数ペア:

[(1, 20808548721), (3, 6936182907), (9, 2312060969), (71, 293078151), (213, 97692717), (639, 32564239)]