What is the Greatest Common Factor of 87981 and 87990?

Greatest common factor (GCF) of 87981 and 87990 is 3.

GCF(87981,87990) = 3

We will now calculate the prime factors of 87981 and 87990, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 87981 and 87990.

How to find the GCF of 87981 and 87990?

We will first find the prime factorization of 87981 and 87990. After we will calculate the factors of 87981 and 87990 and find the biggest common factor number .

Step-1: Prime Factorization of 87981

Prime factors of 87981 are 3, 29327. Prime factorization of 87981 in exponential form is:

87981 = 3¹ × 29327¹

Step-2: Prime Factorization of 87990

Prime factors of 87990 are 2, 3, 5, 7, 419. Prime factorization of 87990 in exponential form is:

87990 = 2¹ × 3¹ × 5¹ × 7¹ × 419¹

Step-3: Factors of 87981

List of positive integer factors of 87981 that divides 87981 without a remainder.

1, 3, 29327

Step-4: Factors of 87990

List of positive integer factors of 87990 that divides 87981 without a remainder.

1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 210, 419, 838, 1257, 2095, 2514, 2933, 4190, 5866, 6285, 8799, 12570, 14665, 17598, 29330, 43995

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 87981 and 87990. The biggest common factor number is the GCF number.
So the greatest common factor 87981 and 87990 is 3.

Also check out the Least Common Multiple of 87981 and 87990