21680121

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{311}}^1\times {\mathrm{1223}}^1$

素因数の和:1556

約数の個数: 16

約数和(自身を含む): 30551040

約数和(自身を除く): 8870919

約数列:

[1, 3, 19, 57, 311, 933, 1223, 3669, 5909, 17727, 23237, 69711, 380353, 1141059, 7226707, 21680121]

約数ペア:

[(1, 21680121), (3, 7226707), (19, 1141059), (57, 380353), (311, 69711), (933, 23237), (1223, 17727), (3669, 5909)]