20889100

素因数分解:

$2^2\times 5^2\times {\mathrm{208891}}^1$

素因数の和:208905

約数の個数: 18

約数和(自身を含む): 45329564

約数和(自身を除く): 24440464

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 208891, 417782, 835564, 1044455, 2088910, 4177820, 5222275, 10444550, 20889100]

約数ペア:

[(1, 20889100), (2, 10444550), (4, 5222275), (5, 4177820), (10, 2088910), (20, 1044455), (25, 835564), (50, 417782), (100, 208891)]