Greatest Common Factor of 12, 17, 20, 87

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

• Greatest Common Factor of 12, 17, 20, 87 by common division method
• Greatest Common Factor of 12, 17, 20, 87 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 12

List of positive integer factors of 12 that divides 12 without a remainder.

1,2,3,4,6,12

Factors of 17

List of positive integer factors of 17 that divides 17 without a remainder.

1,17

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Factors of 87

List of positive integer factors of 87 that divides 87 without a remainder.

1,3,29,87

Greatest Common Factor

We found the factors 12,17,20,87 . The biggest common factor number is the GCF number.
So the greatest common factor 12,17,20,87 is 1.

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

• GCF of 31, 52, 40, 43
• GCF of 24, 19, 64, 21
• GCF of 37, 95, 82, 20
• GCF of 66, 70, 98, 86
• GCF of 65, 97, 65, 53

1. What is the GCF of 12, 17, 20, 87?

Answer: GCF of 12, 17, 20, 87 is 1.

2. How to Find the GCF of 12, 17, 20, 87

Answer: Greatest Common Factor(GCF) of 12, 17, 20, 87 = 1

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

Step 2: Then multiply all the prime factors GCF(12, 17, 20, 87) = 1.