What is the Greatest Common Factor of 42975 and 42990?

Greatest common factor (GCF) of 42975 and 42990 is 15.

GCF(42975,42990) = 15

We will now calculate the prime factors of 42975 and 42990, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42975 and 42990.

How to find the GCF of 42975 and 42990?

We will first find the prime factorization of 42975 and 42990. After we will calculate the factors of 42975 and 42990 and find the biggest common factor number .

Step-1: Prime Factorization of 42975

Prime factors of 42975 are 3, 5, 191. Prime factorization of 42975 in exponential form is:

42975 = 3² × 5² × 191¹

Step-2: Prime Factorization of 42990

Prime factors of 42990 are 2, 3, 5, 1433. Prime factorization of 42990 in exponential form is:

42990 = 2¹ × 3¹ × 5¹ × 1433¹

Step-3: Factors of 42975

List of positive integer factors of 42975 that divides 42975 without a remainder.

1, 3, 5, 9, 15, 25, 45, 75, 191, 225, 573, 955, 1719, 2865, 4775, 8595, 14325

Step-4: Factors of 42990

List of positive integer factors of 42990 that divides 42975 without a remainder.

1, 2, 3, 5, 6, 10, 15, 30, 1433, 2866, 4299, 7165, 8598, 14330, 21495

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42975 and 42990. The biggest common factor number is the GCF number.
So the greatest common factor 42975 and 42990 is 15.

Also check out the Least Common Multiple of 42975 and 42990