21047481

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{829}}^1$

素因数の和:886

約数の個数: 48

約数和(自身を含む): 38671360

約数和(自身を除く): 17623879

約数列:

[1, 3, 7, 9, 13, 21, 31, 39, 63, 91, 93, 117, 217, 273, 279, 403, 651, 819, 829, 1209, 1953, 2487, 2821, 3627, 5803, 7461, 8463, 10777, 17409, 25389, 25699, 32331, 52227, 75439, 77097, 96993, 179893, 226317, 231291, 334087, 539679, 678951, 1002261, 1619037, 2338609, 3006783, 7015827, 21047481]

約数ペア:

[(1, 21047481), (3, 7015827), (7, 3006783), (9, 2338609), (13, 1619037), (21, 1002261), (31, 678951), (39, 539679), (63, 334087), (91, 231291), (93, 226317), (117, 179893), (217, 96993), (273, 77097), (279, 75439), (403, 52227), (651, 32331), (819, 25699), (829, 25389), (1209, 17409), (1953, 10777), (2487, 8463), (2821, 7461), (3627, 5803)]