What is the Greatest Common Factor of 3891 and 3906?

Greatest common factor (GCF) of 3891 and 3906 is 3.

GCF(3891,3906) = 3

We will now calculate the prime factors of 3891 and 3906, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 3891 and 3906.

How to find the GCF of 3891 and 3906?

We will first find the prime factorization of 3891 and 3906. After we will calculate the factors of 3891 and 3906 and find the biggest common factor number .

Step-1: Prime Factorization of 3891

Prime factors of 3891 are 3, 1297. Prime factorization of 3891 in exponential form is:

3891 = 3¹ × 1297¹

Step-2: Prime Factorization of 3906

Prime factors of 3906 are 2, 3, 7, 31. Prime factorization of 3906 in exponential form is:

3906 = 2¹ × 3² × 7¹ × 31¹

Step-3: Factors of 3891

List of positive integer factors of 3891 that divides 3891 without a remainder.

1, 3, 1297

Step-4: Factors of 3906

List of positive integer factors of 3906 that divides 3891 without a remainder.

1, 2, 3, 6, 7, 9, 14, 18, 21, 31, 42, 62, 63, 93, 126, 186, 217, 279, 434, 558, 651, 1302, 1953

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 3891 and 3906. The biggest common factor number is the GCF number.
So the greatest common factor 3891 and 3906 is 3.

Also check out the Least Common Multiple of 3891 and 3906