21131121

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{241}}^1\times {\mathrm{2657}}^1$

素因数の和:2912

約数の個数: 16

約数和(自身を含む): 30875328

約数和(自身を除く): 9744207

約数列:

[1, 3, 11, 33, 241, 723, 2651, 2657, 7953, 7971, 29227, 87681, 640337, 1921011, 7043707, 21131121]

約数ペア:

[(1, 21131121), (3, 7043707), (11, 1921011), (33, 640337), (241, 87681), (723, 29227), (2651, 7971), (2657, 7953)]