Greatest Common Factor of 12, 28, 40, 87

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

• Greatest Common Factor of 12, 28, 40, 87 by common division method
• Greatest Common Factor of 12, 28, 40, 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 28

List of positive integer factors of 28 that divides 28 without a remainder.

1,2,4,7,14,28

Factors of 40

List of positive integer factors of 40 that divides 40 without a remainder.

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

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 12,28,40,87 . The biggest common factor number is the GCF number.
So the greatest common factor 12,28,40,87 is 1.

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

• GCF of 60, 94, 80, 38
• GCF of 52, 19, 10, 75
• GCF of 43, 63, 12, 50
• GCF of 27, 81, 30, 11
• GCF of 88, 51, 49, 17

1. What is the GCF of 12, 28, 40, 87?

Answer: GCF of 12, 28, 40, 87 is 1.

2. How to Find the GCF of 12, 28, 40, 87

Answer: Greatest Common Factor(GCF) of 12, 28, 40, 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, 28, 40, 87) = 1.