21521379

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{163}}^1\times {\mathrm{4001}}^1$

素因数の和:4178

約数の個数: 16

約数和(自身を含む): 31503744

約数和(自身を除く): 9982365

約数列:

[1, 3, 11, 33, 163, 489, 1793, 4001, 5379, 12003, 44011, 132033, 652163, 1956489, 7173793, 21521379]

約数ペア:

[(1, 21521379), (3, 7173793), (11, 1956489), (33, 652163), (163, 132033), (489, 44011), (1793, 12003), (4001, 5379)]