What is the Greatest Common Factor of 42721 and 42738?

Greatest common factor (GCF) of 42721 and 42738 is 17.

GCF(42721,42738) = 17

We will now calculate the prime factors of 42721 and 42738, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42721 and 42738.

How to find the GCF of 42721 and 42738?

We will first find the prime factorization of 42721 and 42738. After we will calculate the factors of 42721 and 42738 and find the biggest common factor number .

Step-1: Prime Factorization of 42721

Prime factors of 42721 are 7, 17, 359. Prime factorization of 42721 in exponential form is:

42721 = 7¹ × 17¹ × 359¹

Step-2: Prime Factorization of 42738

Prime factors of 42738 are 2, 3, 17, 419. Prime factorization of 42738 in exponential form is:

42738 = 2¹ × 3¹ × 17¹ × 419¹

Step-3: Factors of 42721

List of positive integer factors of 42721 that divides 42721 without a remainder.

1, 7, 17, 119, 359, 2513, 6103

Step-4: Factors of 42738

List of positive integer factors of 42738 that divides 42721 without a remainder.

1, 2, 3, 6, 17, 34, 51, 102, 419, 838, 1257, 2514, 7123, 14246, 21369

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42721 and 42738. The biggest common factor number is the GCF number.
So the greatest common factor 42721 and 42738 is 17.

Also check out the Least Common Multiple of 42721 and 42738