640629

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{719}}^1$

素因数の和:742

約数の個数: 20

約数和(自身を含む): 1045440

約数和(自身を除く): 404811

約数列:

[1, 3, 9, 11, 27, 33, 81, 99, 297, 719, 891, 2157, 6471, 7909, 19413, 23727, 58239, 71181, 213543, 640629]

約数ペア:

[(1, 640629), (3, 213543), (9, 71181), (11, 58239), (27, 23727), (33, 19413), (81, 7909), (99, 6471), (297, 2157), (719, 891)]