What is the Greatest Common Factor of 81980 and 81992?

Greatest common factor (GCF) of 81980 and 81992 is 4.

GCF(81980,81992) = 4

We will now calculate the prime factors of 81980 and 81992, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81980 and 81992.

How to find the GCF of 81980 and 81992?

We will first find the prime factorization of 81980 and 81992. After we will calculate the factors of 81980 and 81992 and find the biggest common factor number .

Step-1: Prime Factorization of 81980

Prime factors of 81980 are 2, 5, 4099. Prime factorization of 81980 in exponential form is:

81980 = 2² × 5¹ × 4099¹

Step-2: Prime Factorization of 81992

Prime factors of 81992 are 2, 37, 277. Prime factorization of 81992 in exponential form is:

81992 = 2³ × 37¹ × 277¹

Step-3: Factors of 81980

List of positive integer factors of 81980 that divides 81980 without a remainder.

1, 2, 4, 5, 10, 20, 4099, 8198, 16396, 20495, 40990

Step-4: Factors of 81992

List of positive integer factors of 81992 that divides 81980 without a remainder.

1, 2, 4, 8, 37, 74, 148, 277, 296, 554, 1108, 2216, 10249, 20498, 40996

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81980 and 81992. The biggest common factor number is the GCF number.
So the greatest common factor 81980 and 81992 is 4.

Also check out the Least Common Multiple of 81980 and 81992