What is the Greatest Common Factor of 1965 and 1983?

Greatest common factor (GCF) of 1965 and 1983 is 3.

GCF(1965,1983) = 3

We will now calculate the prime factors of 1965 and 1983, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1965 and 1983.

How to find the GCF of 1965 and 1983?

We will first find the prime factorization of 1965 and 1983. After we will calculate the factors of 1965 and 1983 and find the biggest common factor number .

Step-1: Prime Factorization of 1965

Prime factors of 1965 are 3, 5, 131. Prime factorization of 1965 in exponential form is:

1965 = 3¹ × 5¹ × 131¹

Step-2: Prime Factorization of 1983

Prime factors of 1983 are 3, 661. Prime factorization of 1983 in exponential form is:

1983 = 3¹ × 661¹

Step-3: Factors of 1965

List of positive integer factors of 1965 that divides 1965 without a remainder.

1, 3, 5, 15, 131, 393, 655

Step-4: Factors of 1983

List of positive integer factors of 1983 that divides 1965 without a remainder.

1, 3, 661

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1965 and 1983. The biggest common factor number is the GCF number.
So the greatest common factor 1965 and 1983 is 3.

Also check out the Least Common Multiple of 1965 and 1983