21918765

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{1871}}^1$

素因数の和:1961

約数の個数: 32

約数和(自身を含む): 38817792

約数和(自身を除く): 16899027

約数列:

[1, 3, 5, 11, 15, 33, 55, 71, 165, 213, 355, 781, 1065, 1871, 2343, 3905, 5613, 9355, 11715, 20581, 28065, 61743, 102905, 132841, 308715, 398523, 664205, 1461251, 1992615, 4383753, 7306255, 21918765]

約数ペア:

[(1, 21918765), (3, 7306255), (5, 4383753), (11, 1992615), (15, 1461251), (33, 664205), (55, 398523), (71, 308715), (165, 132841), (213, 102905), (355, 61743), (781, 28065), (1065, 20581), (1871, 11715), (2343, 9355), (3905, 5613)]