What is the Greatest Common Factor of 340 and 356?

Greatest common factor (GCF) of 340 and 356 is 4.

GCF(340,356) = 4

We will now calculate the prime factors of 340 and 356, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 340 and 356.

How to find the GCF of 340 and 356?

We will first find the prime factorization of 340 and 356. After we will calculate the factors of 340 and 356 and find the biggest common factor number .

Step-1: Prime Factorization of 340

Prime factors of 340 are 2, 5, 17. Prime factorization of 340 in exponential form is:

340 = 2² × 5¹ × 17¹

Step-2: Prime Factorization of 356

Prime factors of 356 are 2, 89. Prime factorization of 356 in exponential form is:

356 = 2² × 89¹

Step-3: Factors of 340

List of positive integer factors of 340 that divides 340 without a remainder.

1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170

Step-4: Factors of 356

List of positive integer factors of 356 that divides 340 without a remainder.

1, 2, 4, 89, 178

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 340 and 356. The biggest common factor number is the GCF number.
So the greatest common factor 340 and 356 is 4.

Also check out the Least Common Multiple of 340 and 356