257551255

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{127817}}^1$

素因数の和:127866

約数の個数: 16

約数和(自身を含む): 343574784

約数和(自身を除く): 86023529

約数列:

[1, 5, 13, 31, 65, 155, 403, 2015, 127817, 639085, 1661621, 3962327, 8308105, 19811635, 51510251, 257551255]

約数ペア:

[(1, 257551255), (5, 51510251), (13, 19811635), (31, 8308105), (65, 3962327), (155, 1661621), (403, 639085), (2015, 127817)]