161028025

素因数分解:

$5^2\times {\mathrm{139}}^1\times {\mathrm{149}}^1\times {\mathrm{311}}^1$

素因数の和:609

約数の個数: 24

約数和(自身を含む): 203112000

約数和(自身を除く): 42083975

約数列:

[1, 5, 25, 139, 149, 311, 695, 745, 1555, 3475, 3725, 7775, 20711, 43229, 46339, 103555, 216145, 231695, 517775, 1080725, 1158475, 6441121, 32205605, 161028025]

約数ペア:

[(1, 161028025), (5, 32205605), (25, 6441121), (139, 1158475), (149, 1080725), (311, 517775), (695, 231695), (745, 216145), (1555, 103555), (3475, 46339), (3725, 43229), (7775, 20711)]