What is the Greatest Common Factor of 1720 and 1738?

Greatest common factor (GCF) of 1720 and 1738 is 2.

GCF(1720,1738) = 2

We will now calculate the prime factors of 1720 and 1738, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1720 and 1738.

How to find the GCF of 1720 and 1738?

We will first find the prime factorization of 1720 and 1738. After we will calculate the factors of 1720 and 1738 and find the biggest common factor number .

Step-1: Prime Factorization of 1720

Prime factors of 1720 are 2, 5, 43. Prime factorization of 1720 in exponential form is:

1720 = 2³ × 5¹ × 43¹

Step-2: Prime Factorization of 1738

Prime factors of 1738 are 2, 11, 79. Prime factorization of 1738 in exponential form is:

1738 = 2¹ × 11¹ × 79¹

Step-3: Factors of 1720

List of positive integer factors of 1720 that divides 1720 without a remainder.

1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860

Step-4: Factors of 1738

List of positive integer factors of 1738 that divides 1720 without a remainder.

1, 2, 11, 22, 79, 158, 869

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1720 and 1738. The biggest common factor number is the GCF number.
So the greatest common factor 1720 and 1738 is 2.

Also check out the Least Common Multiple of 1720 and 1738