What is the Greatest Common Factor of 1105 and 1120?

Greatest common factor (GCF) of 1105 and 1120 is 5.

GCF(1105,1120) = 5

We will now calculate the prime factors of 1105 and 1120, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1105 and 1120.

How to find the GCF of 1105 and 1120?

We will first find the prime factorization of 1105 and 1120. After we will calculate the factors of 1105 and 1120 and find the biggest common factor number .

Step-1: Prime Factorization of 1105

Prime factors of 1105 are 5, 13, 17. Prime factorization of 1105 in exponential form is:

1105 = 5¹ × 13¹ × 17¹

Step-2: Prime Factorization of 1120

Prime factors of 1120 are 2, 5, 7. Prime factorization of 1120 in exponential form is:

1120 = 2⁵ × 5¹ × 7¹

Step-3: Factors of 1105

List of positive integer factors of 1105 that divides 1105 without a remainder.

1, 5, 13, 17, 65, 85, 221

Step-4: Factors of 1120

List of positive integer factors of 1120 that divides 1105 without a remainder.

1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1105 and 1120. The biggest common factor number is the GCF number.
So the greatest common factor 1105 and 1120 is 5.

Also check out the Least Common Multiple of 1105 and 1120