21228957

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{163}}^1\times {\mathrm{499}}^1$

素因数の和:697

約数の個数: 24

約数和(自身を含む): 31980000

約数和(自身を除く): 10751043

約数列:

[1, 3, 9, 29, 87, 163, 261, 489, 499, 1467, 1497, 4491, 4727, 14181, 14471, 42543, 43413, 81337, 130239, 244011, 732033, 2358773, 7076319, 21228957]

約数ペア:

[(1, 21228957), (3, 7076319), (9, 2358773), (29, 732033), (87, 244011), (163, 130239), (261, 81337), (489, 43413), (499, 42543), (1467, 14471), (1497, 14181), (4491, 4727)]