257020821

素因数分解:

$3^2\times {\mathrm{131}}^1\times {\mathrm{277}}^1\times {\mathrm{787}}^1$

素因数の和:1201

約数の個数: 24

約数和(自身を含む): 375913824

約数和(自身を除く): 118893003

約数列:

[1, 3, 9, 131, 277, 393, 787, 831, 1179, 2361, 2493, 7083, 36287, 103097, 108861, 217999, 309291, 326583, 653997, 927873, 1961991, 28557869, 85673607, 257020821]

約数ペア:

[(1, 257020821), (3, 85673607), (9, 28557869), (131, 1961991), (277, 927873), (393, 653997), (787, 326583), (831, 309291), (1179, 217999), (2361, 108861), (2493, 103097), (7083, 36287)]