What is the Greatest Common Factor of 42009 and 42015?

Greatest common factor (GCF) of 42009 and 42015 is 3.

GCF(42009,42015) = 3

We will now calculate the prime factors of 42009 and 42015, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42009 and 42015.

How to find the GCF of 42009 and 42015?

We will first find the prime factorization of 42009 and 42015. After we will calculate the factors of 42009 and 42015 and find the biggest common factor number .

Step-1: Prime Factorization of 42009

Prime factors of 42009 are 3, 11, 19, 67. Prime factorization of 42009 in exponential form is:

42009 = 3¹ × 11¹ × 19¹ × 67¹

Step-2: Prime Factorization of 42015

Prime factors of 42015 are 3, 5, 2801. Prime factorization of 42015 in exponential form is:

42015 = 3¹ × 5¹ × 2801¹

Step-3: Factors of 42009

List of positive integer factors of 42009 that divides 42009 without a remainder.

1, 3, 11, 19, 33, 57, 67, 201, 209, 627, 737, 1273, 2211, 3819, 14003

Step-4: Factors of 42015

List of positive integer factors of 42015 that divides 42009 without a remainder.

1, 3, 5, 15, 2801, 8403, 14005

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42009 and 42015. The biggest common factor number is the GCF number.
So the greatest common factor 42009 and 42015 is 3.

Also check out the Least Common Multiple of 42009 and 42015