21539277

素因数分解:

$3^5\times {\mathrm{137}}^1\times {\mathrm{647}}^1$

素因数の和:799

約数の個数: 24

約数和(自身を含む): 32550336

約数和(自身を除く): 11011059

約数列:

[1, 3, 9, 27, 81, 137, 243, 411, 647, 1233, 1941, 3699, 5823, 11097, 17469, 33291, 52407, 88639, 157221, 265917, 797751, 2393253, 7179759, 21539277]

約数ペア:

[(1, 21539277), (3, 7179759), (9, 2393253), (27, 797751), (81, 265917), (137, 157221), (243, 88639), (411, 52407), (647, 33291), (1233, 17469), (1941, 11097), (3699, 5823)]