257890689

素因数分解:

$3^3\times 7^1\times {\mathrm{293}}^1\times {\mathrm{4657}}^1$

素因数の和:4966

約数の個数: 32

約数和(自身を含む): 438224640

約数和(自身を除く): 180333951

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 293, 879, 2051, 2637, 4657, 6153, 7911, 13971, 18459, 32599, 41913, 55377, 97797, 125739, 293391, 880173, 1364501, 4093503, 9551507, 12280509, 28654521, 36841527, 85963563, 257890689]

約数ペア:

[(1, 257890689), (3, 85963563), (7, 36841527), (9, 28654521), (21, 12280509), (27, 9551507), (63, 4093503), (189, 1364501), (293, 880173), (879, 293391), (2051, 125739), (2637, 97797), (4657, 55377), (6153, 41913), (7911, 32599), (13971, 18459)]