21211463

素因数分解:

$7^3\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:172

約数の個数: 32

約数和(自身を含む): 27417600

約数和(自身を除く): 6206137

約数列:

[1, 7, 13, 49, 67, 71, 91, 343, 469, 497, 637, 871, 923, 3283, 3479, 4459, 4757, 6097, 6461, 22981, 24353, 33299, 42679, 45227, 61841, 233093, 298753, 316589, 432887, 1631651, 3030209, 21211463]

約数ペア:

[(1, 21211463), (7, 3030209), (13, 1631651), (49, 432887), (67, 316589), (71, 298753), (91, 233093), (343, 61841), (469, 45227), (497, 42679), (637, 33299), (871, 24353), (923, 22981), (3283, 6461), (3479, 6097), (4459, 4757)]