What is the Greatest Common Factor of 81516 and 81520?

Greatest common factor (GCF) of 81516 and 81520 is 4.

GCF(81516,81520) = 4

We will now calculate the prime factors of 81516 and 81520, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81516 and 81520.

How to find the GCF of 81516 and 81520?

We will first find the prime factorization of 81516 and 81520. After we will calculate the factors of 81516 and 81520 and find the biggest common factor number .

Step-1: Prime Factorization of 81516

Prime factors of 81516 are 2, 3, 6793. Prime factorization of 81516 in exponential form is:

81516 = 2² × 3¹ × 6793¹

Step-2: Prime Factorization of 81520

Prime factors of 81520 are 2, 5, 1019. Prime factorization of 81520 in exponential form is:

81520 = 2⁴ × 5¹ × 1019¹

Step-3: Factors of 81516

List of positive integer factors of 81516 that divides 81516 without a remainder.

1, 2, 3, 4, 6, 12, 6793, 13586, 20379, 27172, 40758

Step-4: Factors of 81520

List of positive integer factors of 81520 that divides 81516 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1019, 2038, 4076, 5095, 8152, 10190, 16304, 20380, 40760

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81516 and 81520. The biggest common factor number is the GCF number.
So the greatest common factor 81516 and 81520 is 4.

Also check out the Least Common Multiple of 81516 and 81520