257777991

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{239}}^1\times {\mathrm{929}}^1$

素因数の和:1220

約数の個数: 32

約数和(自身を含む): 392832000

約数和(自身を除く): 135054009

約数列:

[1, 3, 9, 27, 43, 129, 239, 387, 717, 929, 1161, 2151, 2787, 6453, 8361, 10277, 25083, 30831, 39947, 92493, 119841, 222031, 277479, 359523, 666093, 1078569, 1998279, 5994837, 9547333, 28641999, 85925997, 257777991]

約数ペア:

[(1, 257777991), (3, 85925997), (9, 28641999), (27, 9547333), (43, 5994837), (129, 1998279), (239, 1078569), (387, 666093), (717, 359523), (929, 277479), (1161, 222031), (2151, 119841), (2787, 92493), (6453, 39947), (8361, 30831), (10277, 25083)]