21765555

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{9871}}^1$

素因数の和:9896

約数の個数: 36

約数和(自身を含む): 43890912

約数和(自身を除く): 22125357

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 105, 147, 245, 315, 441, 735, 2205, 9871, 29613, 49355, 69097, 88839, 148065, 207291, 345485, 444195, 483679, 621873, 1036455, 1451037, 2418395, 3109365, 4353111, 7255185, 21765555]

約数ペア:

[(1, 21765555), (3, 7255185), (5, 4353111), (7, 3109365), (9, 2418395), (15, 1451037), (21, 1036455), (35, 621873), (45, 483679), (49, 444195), (63, 345485), (105, 207291), (147, 148065), (245, 88839), (315, 69097), (441, 49355), (735, 29613), (2205, 9871)]