What is the Greatest Common Factor of 78940 and 78946?

Greatest common factor (GCF) of 78940 and 78946 is 2.

GCF(78940,78946) = 2

We will now calculate the prime factors of 78940 and 78946, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 78940 and 78946.

How to find the GCF of 78940 and 78946?

We will first find the prime factorization of 78940 and 78946. After we will calculate the factors of 78940 and 78946 and find the biggest common factor number .

Step-1: Prime Factorization of 78940

Prime factors of 78940 are 2, 5, 3947. Prime factorization of 78940 in exponential form is:

78940 = 2² × 5¹ × 3947¹

Step-2: Prime Factorization of 78946

Prime factors of 78946 are 2, 7, 5639. Prime factorization of 78946 in exponential form is:

78946 = 2¹ × 7¹ × 5639¹

Step-3: Factors of 78940

List of positive integer factors of 78940 that divides 78940 without a remainder.

1, 2, 4, 5, 10, 20, 3947, 7894, 15788, 19735, 39470

Step-4: Factors of 78946

List of positive integer factors of 78946 that divides 78940 without a remainder.

1, 2, 7, 14, 5639, 11278, 39473

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 78940 and 78946. The biggest common factor number is the GCF number.
So the greatest common factor 78940 and 78946 is 2.

Also check out the Least Common Multiple of 78940 and 78946