39721311

素因数分解:

$3^2\times 7^2\times {\mathrm{90071}}^1$

素因数の和:90091

約数の個数: 18

約数和(自身を含む): 66743352

約数和(自身を除く): 27022041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 90071, 270213, 630497, 810639, 1891491, 4413479, 5674473, 13240437, 39721311]

約数ペア:

[(1, 39721311), (3, 13240437), (7, 5674473), (9, 4413479), (21, 1891491), (49, 810639), (63, 630497), (147, 270213), (441, 90071)]