What is the Greatest Common Factor of 20890 and 20906?

Greatest common factor (GCF) of 20890 and 20906 is 2.

GCF(20890,20906) = 2

We will now calculate the prime factors of 20890 and 20906, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20890 and 20906.

How to find the GCF of 20890 and 20906?

We will first find the prime factorization of 20890 and 20906. After we will calculate the factors of 20890 and 20906 and find the biggest common factor number .

Step-1: Prime Factorization of 20890

Prime factors of 20890 are 2, 5, 2089. Prime factorization of 20890 in exponential form is:

20890 = 2¹ × 5¹ × 2089¹

Step-2: Prime Factorization of 20906

Prime factors of 20906 are 2, 10453. Prime factorization of 20906 in exponential form is:

20906 = 2¹ × 10453¹

Step-3: Factors of 20890

List of positive integer factors of 20890 that divides 20890 without a remainder.

1, 2, 5, 10, 2089, 4178, 10445

Step-4: Factors of 20906

List of positive integer factors of 20906 that divides 20890 without a remainder.

1, 2, 10453

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20890 and 20906. The biggest common factor number is the GCF number.
So the greatest common factor 20890 and 20906 is 2.

Also check out the Least Common Multiple of 20890 and 20906