21236440

素因数分解:

$2^3\times 5^1\times {\mathrm{530911}}^1$

素因数の和:530922

約数の個数: 16

約数和(自身を含む): 47782080

約数和(自身を除く): 26545640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 530911, 1061822, 2123644, 2654555, 4247288, 5309110, 10618220, 21236440]

約数ペア:

[(1, 21236440), (2, 10618220), (4, 5309110), (5, 4247288), (8, 2654555), (10, 2123644), (20, 1061822), (40, 530911)]