What is the Greatest Common Factor of 71970 and 71985?

Greatest common factor (GCF) of 71970 and 71985 is 15.

GCF(71970,71985) = 15

We will now calculate the prime factors of 71970 and 71985, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 71970 and 71985.

How to find the GCF of 71970 and 71985?

We will first find the prime factorization of 71970 and 71985. After we will calculate the factors of 71970 and 71985 and find the biggest common factor number .

Step-1: Prime Factorization of 71970

Prime factors of 71970 are 2, 3, 5, 2399. Prime factorization of 71970 in exponential form is:

71970 = 2¹ × 3¹ × 5¹ × 2399¹

Step-2: Prime Factorization of 71985

Prime factors of 71985 are 3, 5, 4799. Prime factorization of 71985 in exponential form is:

71985 = 3¹ × 5¹ × 4799¹

Step-3: Factors of 71970

List of positive integer factors of 71970 that divides 71970 without a remainder.

1, 2, 3, 5, 6, 10, 15, 30, 2399, 4798, 7197, 11995, 14394, 23990, 35985

Step-4: Factors of 71985

List of positive integer factors of 71985 that divides 71970 without a remainder.

1, 3, 5, 15, 4799, 14397, 23995

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 71970 and 71985. The biggest common factor number is the GCF number.
So the greatest common factor 71970 and 71985 is 15.

Also check out the Least Common Multiple of 71970 and 71985