256543209

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{128981}}^1$

素因数の和:129017

約数の個数: 24

約数和(自身を含む): 422545032

約数和(自身を除く): 166001823

約数列:

[1, 3, 9, 13, 17, 39, 51, 117, 153, 221, 663, 1989, 128981, 386943, 1160829, 1676753, 2192677, 5030259, 6578031, 15090777, 19734093, 28504801, 85514403, 256543209]

約数ペア:

[(1, 256543209), (3, 85514403), (9, 28504801), (13, 19734093), (17, 15090777), (39, 6578031), (51, 5030259), (117, 2192677), (153, 1676753), (221, 1160829), (663, 386943), (1989, 128981)]