257121277

素因数分解:

$7^2\times {\mathrm{17}}^2\times {\mathrm{67}}^1\times {\mathrm{271}}^1$

素因数の和:386

約数の個数: 36

約数和(自身を含む): 323661504

約数和(自身を除く): 66540227

約数列:

[1, 7, 17, 49, 67, 119, 271, 289, 469, 833, 1139, 1897, 2023, 3283, 4607, 7973, 13279, 14161, 18157, 19363, 32249, 55811, 78319, 127099, 135541, 225743, 308669, 548233, 889693, 948787, 2160683, 3837631, 5247373, 15124781, 36731611, 257121277]

約数ペア:

[(1, 257121277), (7, 36731611), (17, 15124781), (49, 5247373), (67, 3837631), (119, 2160683), (271, 948787), (289, 889693), (469, 548233), (833, 308669), (1139, 225743), (1897, 135541), (2023, 127099), (3283, 78319), (4607, 55811), (7973, 32249), (13279, 19363), (14161, 18157)]