21518497

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{83}}^1$

素因数の和:158

約数の個数: 48

約数和(自身を含む): 30566592

約数和(自身を除く): 9048095

約数列:

[1, 7, 11, 13, 37, 49, 77, 83, 91, 143, 259, 407, 481, 539, 581, 637, 913, 1001, 1079, 1813, 2849, 3071, 3367, 4067, 5291, 6391, 7007, 7553, 11869, 19943, 21497, 23569, 33781, 37037, 39923, 44737, 52871, 83083, 150479, 236467, 259259, 279461, 439153, 581581, 1655269, 1956227, 3074071, 21518497]

約数ペア:

[(1, 21518497), (7, 3074071), (11, 1956227), (13, 1655269), (37, 581581), (49, 439153), (77, 279461), (83, 259259), (91, 236467), (143, 150479), (259, 83083), (407, 52871), (481, 44737), (539, 39923), (581, 37037), (637, 33781), (913, 23569), (1001, 21497), (1079, 19943), (1813, 11869), (2849, 7553), (3071, 7007), (3367, 6391), (4067, 5291)]