What is the Greatest Common Factor of 873 and 891?

Greatest common factor (GCF) of 873 and 891 is 9.

GCF(873,891) = 9

We will now calculate the prime factors of 873 and 891, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 873 and 891.

How to find the GCF of 873 and 891?

We will first find the prime factorization of 873 and 891. After we will calculate the factors of 873 and 891 and find the biggest common factor number .

Step-1: Prime Factorization of 873

Prime factors of 873 are 3, 97. Prime factorization of 873 in exponential form is:

873 = 3² × 97¹

Step-2: Prime Factorization of 891

Prime factors of 891 are 3, 11. Prime factorization of 891 in exponential form is:

891 = 3⁴ × 11¹

Step-3: Factors of 873

List of positive integer factors of 873 that divides 873 without a remainder.

1, 3, 9, 97, 291

Step-4: Factors of 891

List of positive integer factors of 891 that divides 873 without a remainder.

1, 3, 9, 11, 27, 33, 81, 99, 297

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 873 and 891. The biggest common factor number is the GCF number.
So the greatest common factor 873 and 891 is 9.

Also check out the Least Common Multiple of 873 and 891