Greatest Common Factor of 80, 51, 91, 15

Greatest common factor or Greatest common divisor (GCD) can be calculated in two ways

• Greatest Common Factor of 80, 51, 91, 15 by common division method
• Greatest Common Factor of 80, 51, 91, 15 with matching the biggest common factor

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∴ GCF of numbers is 1 because of no common factors present between them.

Factors of 80

List of positive integer factors of 80 that divides 80 without a remainder.

1,2,4,5,8,10,16,20,40,80

Factors of 51

List of positive integer factors of 51 that divides 51 without a remainder.

1,3,17,51

Factors of 91

List of positive integer factors of 91 that divides 91 without a remainder.

1,7,13,91

Factors of 15

List of positive integer factors of 15 that divides 15 without a remainder.

1,3,5,15

Greatest Common Factor

We found the factors 80,51,91,15 . The biggest common factor number is the GCF number.
So the greatest common factor 80,51,91,15 is 1.

Here are some samples of GCF of two or more Numbers calculations.

• GCF of 69, 81, 66, 50
• GCF of 26, 15, 78, 22
• GCF of 26, 57, 84, 77
• GCF of 97, 57, 91, 46
• GCF of 42, 35, 77, 67

1. What is the GCF of 80, 51, 91, 15?

Answer: GCF of 80, 51, 91, 15 is 1.

2. How to Find the GCF of 80, 51, 91, 15

Answer: Greatest Common Factor(GCF) of 80, 51, 91, 15 = 1

Step 1: Divide all the numbers with common prime numbers having remainder zero.

Step 2: Then multiply all the prime factors GCF(80, 51, 91, 15) = 1.