21155080

素因数分解:

$2^3\times 5^1\times {\mathrm{528877}}^1$

素因数の和:528888

約数の個数: 16

約数和(自身を含む): 47599020

約数和(自身を除く): 26443940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 528877, 1057754, 2115508, 2644385, 4231016, 5288770, 10577540, 21155080]

約数ペア:

[(1, 21155080), (2, 10577540), (4, 5288770), (5, 4231016), (8, 2644385), (10, 2115508), (20, 1057754), (40, 528877)]