257031639

素因数分解:

$3^2\times {\mathrm{19}}^2\times {\mathrm{79111}}^1$

素因数の和:79155

約数の個数: 18

約数和(自身を含む): 391841736

約数和(自身を除く): 134810097

約数列:

[1, 3, 9, 19, 57, 171, 361, 1083, 3249, 79111, 237333, 711999, 1503109, 4509327, 13527981, 28559071, 85677213, 257031639]

約数ペア:

[(1, 257031639), (3, 85677213), (9, 28559071), (19, 13527981), (57, 4509327), (171, 1503109), (361, 711999), (1083, 237333), (3249, 79111)]