21209751

素因数分解:

$3^2\times {\mathrm{41}}^1\times {\mathrm{229}}^1\times {\mathrm{251}}^1$

素因数の和:527

約数の個数: 24

約数和(自身を含む): 31646160

約数和(自身を除く): 10436409

約数列:

[1, 3, 9, 41, 123, 229, 251, 369, 687, 753, 2061, 2259, 9389, 10291, 28167, 30873, 57479, 84501, 92619, 172437, 517311, 2356639, 7069917, 21209751]

約数ペア:

[(1, 21209751), (3, 7069917), (9, 2356639), (41, 517311), (123, 172437), (229, 92619), (251, 84501), (369, 57479), (687, 30873), (753, 28167), (2061, 10291), (2259, 9389)]