21005259

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{20533}}^1$

素因数の和:20578

約数の個数: 16

約数和(自身を含む): 31540224

約数和(自身を除く): 10534965

約数列:

[1, 3, 11, 31, 33, 93, 341, 1023, 20533, 61599, 225863, 636523, 677589, 1909569, 7001753, 21005259]

約数ペア:

[(1, 21005259), (3, 7001753), (11, 1909569), (31, 677589), (33, 636523), (93, 225863), (341, 61599), (1023, 20533)]