21890331

素因数分解:

$3^4\times {\mathrm{29}}^1\times {\mathrm{9319}}^1$

素因数の和:9360

約数の個数: 20

約数和(自身を含む): 33831600

約数和(自身を除く): 11941269

約数列:

[1, 3, 9, 27, 29, 81, 87, 261, 783, 2349, 9319, 27957, 83871, 251613, 270251, 754839, 810753, 2432259, 7296777, 21890331]

約数ペア:

[(1, 21890331), (3, 7296777), (9, 2432259), (27, 810753), (29, 754839), (81, 270251), (87, 251613), (261, 83871), (783, 27957), (2349, 9319)]