What is the Greatest Common Factor of 1720 and 1724?

Greatest common factor (GCF) of 1720 and 1724 is 4.

GCF(1720,1724) = 4

We will now calculate the prime factors of 1720 and 1724, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1720 and 1724.

How to find the GCF of 1720 and 1724?

We will first find the prime factorization of 1720 and 1724. After we will calculate the factors of 1720 and 1724 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 1724

Prime factors of 1724 are 2, 431. Prime factorization of 1724 in exponential form is:

1724 = 2² × 431¹

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 1724

List of positive integer factors of 1724 that divides 1720 without a remainder.

1, 2, 4, 431, 862

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1720 and 1724. The biggest common factor number is the GCF number.
So the greatest common factor 1720 and 1724 is 4.

Also check out the Least Common Multiple of 1720 and 1724