What is the Greatest Common Factor of 3555 and 3561?

Greatest common factor (GCF) of 3555 and 3561 is 3.

GCF(3555,3561) = 3

We will now calculate the prime factors of 3555 and 3561, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 3555 and 3561.

How to find the GCF of 3555 and 3561?

We will first find the prime factorization of 3555 and 3561. After we will calculate the factors of 3555 and 3561 and find the biggest common factor number .

Step-1: Prime Factorization of 3555

Prime factors of 3555 are 3, 5, 79. Prime factorization of 3555 in exponential form is:

3555 = 3² × 5¹ × 79¹

Step-2: Prime Factorization of 3561

Prime factors of 3561 are 3, 1187. Prime factorization of 3561 in exponential form is:

3561 = 3¹ × 1187¹

Step-3: Factors of 3555

List of positive integer factors of 3555 that divides 3555 without a remainder.

1, 3, 5, 9, 15, 45, 79, 237, 395, 711, 1185

Step-4: Factors of 3561

List of positive integer factors of 3561 that divides 3555 without a remainder.

1, 3, 1187

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 3555 and 3561. The biggest common factor number is the GCF number.
So the greatest common factor 3555 and 3561 is 3.

Also check out the Least Common Multiple of 3555 and 3561