What is the Greatest Common Factor of 20872 and 20890?

Greatest common factor (GCF) of 20872 and 20890 is 2.

GCF(20872,20890) = 2

We will now calculate the prime factors of 20872 and 20890, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20872 and 20890.

How to find the GCF of 20872 and 20890?

We will first find the prime factorization of 20872 and 20890. After we will calculate the factors of 20872 and 20890 and find the biggest common factor number .

Step-1: Prime Factorization of 20872

Prime factors of 20872 are 2, 2609. Prime factorization of 20872 in exponential form is:

20872 = 2³ × 2609¹

Step-2: 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-3: Factors of 20872

List of positive integer factors of 20872 that divides 20872 without a remainder.

1, 2, 4, 8, 2609, 5218, 10436

Step-4: Factors of 20890

List of positive integer factors of 20890 that divides 20872 without a remainder.

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

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20872 and 20890. The biggest common factor number is the GCF number.
So the greatest common factor 20872 and 20890 is 2.

Also check out the Least Common Multiple of 20872 and 20890