20558902

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:173

約数の個数: 64

約数和(自身を含む): 40449024

約数和(自身を除く): 19890122

約数列:

[1, 2, 7, 13, 14, 26, 37, 43, 71, 74, 86, 91, 142, 182, 259, 301, 481, 497, 518, 559, 602, 923, 962, 994, 1118, 1591, 1846, 2627, 3053, 3182, 3367, 3913, 5254, 6106, 6461, 6734, 7826, 11137, 12922, 18389, 20683, 21371, 22274, 34151, 36778, 39689, 41366, 42742, 68302, 79378, 112961, 144781, 225922, 239057, 277823, 289562, 478114, 555646, 790727, 1468493, 1581454, 2936986, 10279451, 20558902]

約数ペア:

[(1, 20558902), (2, 10279451), (7, 2936986), (13, 1581454), (14, 1468493), (26, 790727), (37, 555646), (43, 478114), (71, 289562), (74, 277823), (86, 239057), (91, 225922), (142, 144781), (182, 112961), (259, 79378), (301, 68302), (481, 42742), (497, 41366), (518, 39689), (559, 36778), (602, 34151), (923, 22274), (962, 21371), (994, 20683), (1118, 18389), (1591, 12922), (1846, 11137), (2627, 7826), (3053, 6734), (3182, 6461), (3367, 6106), (3913, 5254)]