21808359

素因数分解:

$3^4\times {\mathrm{307}}^1\times {\mathrm{877}}^1$

素因数の和:1196

約数の個数: 20

約数和(自身を含む): 32721304

約数和(自身を除く): 10912945

約数列:

[1, 3, 9, 27, 81, 307, 877, 921, 2631, 2763, 7893, 8289, 23679, 24867, 71037, 269239, 807717, 2423151, 7269453, 21808359]

約数ペア:

[(1, 21808359), (3, 7269453), (9, 2423151), (27, 807717), (81, 269239), (307, 71037), (877, 24867), (921, 23679), (2631, 8289), (2763, 7893)]