81130721

素因数分解:

$7^2\times {\mathrm{401}}^1\times {\mathrm{4129}}^1$

素因数の和:4544

約数の個数: 12

約数和(自身を含む): 94634820

約数和(自身を除く): 13504099

約数列:

[1, 7, 49, 401, 2807, 4129, 19649, 28903, 202321, 1655729, 11590103, 81130721]

約数ペア:

[(1, 81130721), (7, 11590103), (49, 1655729), (401, 202321), (2807, 28903), (4129, 19649)]