21628989

素因数分解:

$3^2\times {\mathrm{127}}^2\times {\mathrm{149}}^1$

素因数の和:409

約数の個数: 18

約数和(自身を含む): 31701150

約数和(自身を除く): 10072161

約数列:

[1, 3, 9, 127, 149, 381, 447, 1143, 1341, 16129, 18923, 48387, 56769, 145161, 170307, 2403221, 7209663, 21628989]

約数ペア:

[(1, 21628989), (3, 7209663), (9, 2403221), (127, 170307), (149, 145161), (381, 56769), (447, 48387), (1143, 18923), (1341, 16129)]