81640881

素因数分解:

$3^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{31607}}^1$

素因数の和:31661

約数の個数: 24

約数和(自身を含む): 138063744

約数和(自身を除く): 56422863

約数列:

[1, 3, 7, 9, 21, 41, 63, 123, 287, 369, 861, 2583, 31607, 94821, 221249, 284463, 663747, 1295887, 1991241, 3887661, 9071209, 11662983, 27213627, 81640881]

約数ペア:

[(1, 81640881), (3, 27213627), (7, 11662983), (9, 9071209), (21, 3887661), (41, 1991241), (63, 1295887), (123, 663747), (287, 284463), (369, 221249), (861, 94821), (2583, 31607)]