20921121

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{178813}}^1$

素因数の和:178832

約数の個数: 12

約数和(自身を含む): 32544148

約数和(自身を除く): 11623027

約数列:

[1, 3, 9, 13, 39, 117, 178813, 536439, 1609317, 2324569, 6973707, 20921121]

約数ペア:

[(1, 20921121), (3, 6973707), (9, 2324569), (13, 1609317), (39, 536439), (117, 178813)]