What is the Greatest Common Factor of 491 and 505?

Greatest common factor (GCF) of 491 and 505 is 1.

GCF(491,505) = 1

We will now calculate the prime factors of 491 and 505, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 491 and 505.

How to find the GCF of 491 and 505?

We will first find the prime factorization of 491 and 505. After we will calculate the factors of 491 and 505 and find the biggest common factor number .

Step-1: Prime Factorization of 491

Prime factors of 491 are 491. Prime factorization of 491 in exponential form is:

491 = 491¹

Step-2: Prime Factorization of 505

Prime factors of 505 are 5, 101. Prime factorization of 505 in exponential form is:

505 = 5¹ × 101¹

Step-3: Factors of 491

List of positive integer factors of 491 that divides 491 without a remainder.

Step-4: Factors of 505

List of positive integer factors of 505 that divides 491 without a remainder.

1, 5, 101

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 491 and 505. The biggest common factor number is the GCF number.
So the greatest common factor 491 and 505 is 1.

Also check out the Least Common Multiple of 491 and 505