256220991

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{128819}}^1$

素因数の和:128855

約数の個数: 24

約数和(自身を含む): 422014320

約数和(自身を除く): 165793329

約数列:

[1, 3, 9, 13, 17, 39, 51, 117, 153, 221, 663, 1989, 128819, 386457, 1159371, 1674647, 2189923, 5023941, 6569769, 15071823, 19709307, 28468999, 85406997, 256220991]

約数ペア:

[(1, 256220991), (3, 85406997), (9, 28468999), (13, 19709307), (17, 15071823), (39, 6569769), (51, 5023941), (117, 2189923), (153, 1674647), (221, 1159371), (663, 386457), (1989, 128819)]