17978247

素因数分解:

$3^3\times 7^2\times {\mathrm{107}}^1\times {\mathrm{127}}^1$

素因数の和:257

約数の個数: 48

約数和(自身を含む): 31518720

約数和(自身を除く): 13540473

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 107, 127, 147, 189, 321, 381, 441, 749, 889, 963, 1143, 1323, 2247, 2667, 2889, 3429, 5243, 6223, 6741, 8001, 13589, 15729, 18669, 20223, 24003, 40767, 47187, 56007, 95123, 122301, 141561, 168021, 285369, 366903, 665861, 856107, 1997583, 2568321, 5992749, 17978247]

約数ペア:

[(1, 17978247), (3, 5992749), (7, 2568321), (9, 1997583), (21, 856107), (27, 665861), (49, 366903), (63, 285369), (107, 168021), (127, 141561), (147, 122301), (189, 95123), (321, 56007), (381, 47187), (441, 40767), (749, 24003), (889, 20223), (963, 18669), (1143, 15729), (1323, 13589), (2247, 8001), (2667, 6741), (2889, 6223), (3429, 5243)]