21355789

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{331}}^1\times {\mathrm{709}}^1$

素因数の和:1060

約数の個数: 16

約数和(自身を含む): 26400640

約数和(自身を除く): 5044851

約数列:

[1, 7, 13, 91, 331, 709, 2317, 4303, 4963, 9217, 30121, 64519, 234679, 1642753, 3050827, 21355789]

約数ペア:

[(1, 21355789), (7, 3050827), (13, 1642753), (91, 234679), (331, 64519), (709, 30121), (2317, 9217), (4303, 4963)]