256639851

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{168731}}^1$

素因数の和:168763

約数の個数: 18

約数和(自身を含む): 401413428

約数和(自身を除く): 144773577

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 168731, 506193, 1518579, 2193503, 6580509, 19741527, 28515539, 85546617, 256639851]

約数ペア:

[(1, 256639851), (3, 85546617), (9, 28515539), (13, 19741527), (39, 6580509), (117, 2193503), (169, 1518579), (507, 506193), (1521, 168731)]