What is the Greatest Common Factor of 1985 and 1992?

Greatest common factor (GCF) of 1985 and 1992 is 1.

GCF(1985,1992) = 1

We will now calculate the prime factors of 1985 and 1992, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1985 and 1992.

How to find the GCF of 1985 and 1992?

We will first find the prime factorization of 1985 and 1992. After we will calculate the factors of 1985 and 1992 and find the biggest common factor number .

Step-1: Prime Factorization of 1985

Prime factors of 1985 are 5, 397. Prime factorization of 1985 in exponential form is:

1985 = 5¹ × 397¹

Step-2: Prime Factorization of 1992

Prime factors of 1992 are 2, 3, 83. Prime factorization of 1992 in exponential form is:

1992 = 2³ × 3¹ × 83¹

Step-3: Factors of 1985

List of positive integer factors of 1985 that divides 1985 without a remainder.

1, 5, 397

Step-4: Factors of 1992

List of positive integer factors of 1992 that divides 1985 without a remainder.

1, 2, 3, 4, 6, 8, 12, 24, 83, 166, 249, 332, 498, 664, 996

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1985 and 1992. The biggest common factor number is the GCF number.
So the greatest common factor 1985 and 1992 is 1.

Also check out the Least Common Multiple of 1985 and 1992