20278881

素因数分解:

$3^2\times 7^1\times {\mathrm{101}}^1\times {\mathrm{3187}}^1$

素因数の和:3301

約数の個数: 24

約数和(自身を含む): 33818304

約数和(自身を除く): 13539423

約数列:

[1, 3, 7, 9, 21, 63, 101, 303, 707, 909, 2121, 3187, 6363, 9561, 22309, 28683, 66927, 200781, 321887, 965661, 2253209, 2896983, 6759627, 20278881]

約数ペア:

[(1, 20278881), (3, 6759627), (7, 2896983), (9, 2253209), (21, 965661), (63, 321887), (101, 200781), (303, 66927), (707, 28683), (909, 22309), (2121, 9561), (3187, 6363)]