What is the Greatest Common Factor of 20870 and 20889?

Greatest common factor (GCF) of 20870 and 20889 is 1.

GCF(20870,20889) = 1

We will now calculate the prime factors of 20870 and 20889, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20870 and 20889.

How to find the GCF of 20870 and 20889?

We will first find the prime factorization of 20870 and 20889. After we will calculate the factors of 20870 and 20889 and find the biggest common factor number .

Step-1: Prime Factorization of 20870

Prime factors of 20870 are 2, 5, 2087. Prime factorization of 20870 in exponential form is:

20870 = 2¹ × 5¹ × 2087¹

Step-2: Prime Factorization of 20889

Prime factors of 20889 are 3, 11, 211. Prime factorization of 20889 in exponential form is:

20889 = 3² × 11¹ × 211¹

Step-3: Factors of 20870

List of positive integer factors of 20870 that divides 20870 without a remainder.

1, 2, 5, 10, 2087, 4174, 10435

Step-4: Factors of 20889

List of positive integer factors of 20889 that divides 20870 without a remainder.

1, 3, 9, 11, 33, 99, 211, 633, 1899, 2321, 6963

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20870 and 20889. The biggest common factor number is the GCF number.
So the greatest common factor 20870 and 20889 is 1.

Also check out the Least Common Multiple of 20870 and 20889