647567991

素因数分解:

$3^2\times 7^1\times {\mathrm{1103}}^1\times {\mathrm{9319}}^1$

素因数の和:10435

約数の個数: 24

約数和(自身を含む): 1070085120

約数和(自身を除く): 422517129

約数列:

[1, 3, 7, 9, 21, 63, 1103, 3309, 7721, 9319, 9927, 23163, 27957, 65233, 69489, 83871, 195699, 587097, 10278857, 30836571, 71951999, 92509713, 215855997, 647567991]

約数ペア:

[(1, 647567991), (3, 215855997), (7, 92509713), (9, 71951999), (21, 30836571), (63, 10278857), (1103, 587097), (3309, 195699), (7721, 83871), (9319, 69489), (9927, 65233), (23163, 27957)]