21757879

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{2143}}^1$

素因数の和:2238

約数の個数: 16

約数和(自身を含む): 25933824

約数和(自身を除く): 4175945

約数列:

[1, 11, 13, 71, 143, 781, 923, 2143, 10153, 23573, 27859, 152153, 306449, 1673683, 1977989, 21757879]

約数ペア:

[(1, 21757879), (11, 1977989), (13, 1673683), (71, 306449), (143, 152153), (781, 27859), (923, 23573), (2143, 10153)]