20149241

素因数分解:

$7^2\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{131}}^1$

素因数の和:261

約数の個数: 24

約数和(自身を含む): 24498144

約数和(自身を除く): 4348903

約数列:

[1, 7, 43, 49, 73, 131, 301, 511, 917, 2107, 3139, 3577, 5633, 6419, 9563, 21973, 39431, 66941, 153811, 276017, 411209, 468587, 2878463, 20149241]

約数ペア:

[(1, 20149241), (7, 2878463), (43, 468587), (49, 411209), (73, 276017), (131, 153811), (301, 66941), (511, 39431), (917, 21973), (2107, 9563), (3139, 6419), (3577, 5633)]