What is the Greatest Common Factor of 3940 and 3945?

Greatest common factor (GCF) of 3940 and 3945 is 5.

GCF(3940,3945) = 5

We will now calculate the prime factors of 3940 and 3945, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 3940 and 3945.

How to find the GCF of 3940 and 3945?

We will first find the prime factorization of 3940 and 3945. After we will calculate the factors of 3940 and 3945 and find the biggest common factor number .

Step-1: Prime Factorization of 3940

Prime factors of 3940 are 2, 5, 197. Prime factorization of 3940 in exponential form is:

3940 = 2² × 5¹ × 197¹

Step-2: Prime Factorization of 3945

Prime factors of 3945 are 3, 5, 263. Prime factorization of 3945 in exponential form is:

3945 = 3¹ × 5¹ × 263¹

Step-3: Factors of 3940

List of positive integer factors of 3940 that divides 3940 without a remainder.

1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970

Step-4: Factors of 3945

List of positive integer factors of 3945 that divides 3940 without a remainder.

1, 3, 5, 15, 263, 789, 1315

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 3940 and 3945. The biggest common factor number is the GCF number.
So the greatest common factor 3940 and 3945 is 5.

Also check out the Least Common Multiple of 3940 and 3945