21659121

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{19889}}^1$

素因数の和:19917

約数の個数: 18

約数和(自身を含む): 34389810

約数和(自身を除く): 12730689

約数列:

[1, 3, 9, 11, 33, 99, 121, 363, 1089, 19889, 59667, 179001, 218779, 656337, 1969011, 2406569, 7219707, 21659121]

約数ペア:

[(1, 21659121), (3, 7219707), (9, 2406569), (11, 1969011), (33, 656337), (99, 218779), (121, 179001), (363, 59667), (1089, 19889)]