What is the Greatest Common Factor of 1940 and 1945?

Greatest common factor (GCF) of 1940 and 1945 is 5.

GCF(1940,1945) = 5

We will now calculate the prime factors of 1940 and 1945, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1940 and 1945.

How to find the GCF of 1940 and 1945?

We will first find the prime factorization of 1940 and 1945. After we will calculate the factors of 1940 and 1945 and find the biggest common factor number .

Step-1: Prime Factorization of 1940

Prime factors of 1940 are 2, 5, 97. Prime factorization of 1940 in exponential form is:

1940 = 2² × 5¹ × 97¹

Step-2: Prime Factorization of 1945

Prime factors of 1945 are 5, 389. Prime factorization of 1945 in exponential form is:

1945 = 5¹ × 389¹

Step-3: Factors of 1940

List of positive integer factors of 1940 that divides 1940 without a remainder.

1, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970

Step-4: Factors of 1945

List of positive integer factors of 1945 that divides 1940 without a remainder.

1, 5, 389

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1940 and 1945. The biggest common factor number is the GCF number.
So the greatest common factor 1940 and 1945 is 5.

Also check out the Least Common Multiple of 1940 and 1945