18910111

素因数分解:

${\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{173}}^1\times {\mathrm{523}}^1$

素因数の和:726

約数の個数: 16

約数和(自身を含む): 21882240

約数和(自身を除く): 2972129

約数列:

[1, 11, 19, 173, 209, 523, 1903, 3287, 5753, 9937, 36157, 90479, 109307, 995269, 1719101, 18910111]

約数ペア:

[(1, 18910111), (11, 1719101), (19, 995269), (173, 109307), (209, 90479), (523, 36157), (1903, 9937), (3287, 5753)]