917721

素因数分解:

$3^2\times 7^2\times {\mathrm{2081}}^1$

素因数の和:2101

約数の個数: 18

約数和(自身を含む): 1542762

約数和(自身を除く): 625041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 2081, 6243, 14567, 18729, 43701, 101969, 131103, 305907, 917721]

約数ペア:

[(1, 917721), (3, 305907), (7, 131103), (9, 101969), (21, 43701), (49, 18729), (63, 14567), (147, 6243), (441, 2081)]