207721717

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{97}}^1\times {\mathrm{283}}^1$

素因数の和:457

約数の個数: 32

約数和(自身を含む): 256499712

約数和(自身を除く): 48777995

約数列:

[1, 7, 23, 47, 97, 161, 283, 329, 679, 1081, 1981, 2231, 4559, 6509, 7567, 13301, 15617, 27451, 31913, 45563, 93107, 104857, 192157, 305923, 631373, 733999, 1290197, 2141461, 4419611, 9031379, 29674531, 207721717]

約数ペア:

[(1, 207721717), (7, 29674531), (23, 9031379), (47, 4419611), (97, 2141461), (161, 1290197), (283, 733999), (329, 631373), (679, 305923), (1081, 192157), (1981, 104857), (2231, 93107), (4559, 45563), (6509, 31913), (7567, 27451), (13301, 15617)]