21755721

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{12973}}^1$

素因数の和:13032

約数の個数: 16

約数和(自身を含む): 31967936

約数和(自身を除く): 10212215

約数列:

[1, 3, 13, 39, 43, 129, 559, 1677, 12973, 38919, 168649, 505947, 557839, 1673517, 7251907, 21755721]

約数ペア:

[(1, 21755721), (3, 7251907), (13, 1673517), (39, 557839), (43, 505947), (129, 168649), (559, 38919), (1677, 12973)]