21241355

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{3187}}^1$

素因数の和:3266

約数の個数: 16

約数和(自身を含む): 26932224

約数和(自身を除く): 5690869

約数列:

[1, 5, 31, 43, 155, 215, 1333, 3187, 6665, 15935, 98797, 137041, 493985, 685205, 4248271, 21241355]

約数ペア:

[(1, 21241355), (5, 4248271), (31, 685205), (43, 493985), (155, 137041), (215, 98797), (1333, 15935), (3187, 6665)]