21156440

素因数分解:

$2^3\times 5^1\times {\mathrm{528911}}^1$

素因数の和:528922

約数の個数: 16

約数和(自身を含む): 47602080

約数和(自身を除く): 26445640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 528911, 1057822, 2115644, 2644555, 4231288, 5289110, 10578220, 21156440]

約数ペア:

[(1, 21156440), (2, 10578220), (4, 5289110), (5, 4231288), (8, 2644555), (10, 2115644), (20, 1057822), (40, 528911)]