What is the Greatest Common Factor of 1781 and 1790?

Greatest common factor (GCF) of 1781 and 1790 is 1.

GCF(1781,1790) = 1

We will now calculate the prime factors of 1781 and 1790, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1781 and 1790.

How to find the GCF of 1781 and 1790?

We will first find the prime factorization of 1781 and 1790. After we will calculate the factors of 1781 and 1790 and find the biggest common factor number .

Step-1: Prime Factorization of 1781

Prime factors of 1781 are 13, 137. Prime factorization of 1781 in exponential form is:

1781 = 13¹ × 137¹

Step-2: Prime Factorization of 1790

Prime factors of 1790 are 2, 5, 179. Prime factorization of 1790 in exponential form is:

1790 = 2¹ × 5¹ × 179¹

Step-3: Factors of 1781

List of positive integer factors of 1781 that divides 1781 without a remainder.

1, 13, 137

Step-4: Factors of 1790

List of positive integer factors of 1790 that divides 1781 without a remainder.

1, 2, 5, 10, 179, 358, 895

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1781 and 1790. The biggest common factor number is the GCF number.
So the greatest common factor 1781 and 1790 is 1.

Also check out the Least Common Multiple of 1781 and 1790