What is the Greatest Common Factor of 20878 and 20891?

Greatest common factor (GCF) of 20878 and 20891 is 13.

GCF(20878,20891) = 13

We will now calculate the prime factors of 20878 and 20891, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20878 and 20891.

How to find the GCF of 20878 and 20891?

We will first find the prime factorization of 20878 and 20891. After we will calculate the factors of 20878 and 20891 and find the biggest common factor number .

Step-1: Prime Factorization of 20878

Prime factors of 20878 are 2, 11, 13, 73. Prime factorization of 20878 in exponential form is:

20878 = 2¹ × 11¹ × 13¹ × 73¹

Step-2: Prime Factorization of 20891

Prime factors of 20891 are 13, 1607. Prime factorization of 20891 in exponential form is:

20891 = 13¹ × 1607¹

Step-3: Factors of 20878

List of positive integer factors of 20878 that divides 20878 without a remainder.

1, 2, 11, 13, 22, 26, 73, 143, 146, 286, 803, 949, 1606, 1898, 10439

Step-4: Factors of 20891

List of positive integer factors of 20891 that divides 20878 without a remainder.

1, 13, 1607

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20878 and 20891. The biggest common factor number is the GCF number.
So the greatest common factor 20878 and 20891 is 13.

Also check out the Least Common Multiple of 20878 and 20891