Greatest Common Factor of 40, 21, 87, 99, 86

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

• Greatest Common Factor of 40, 21, 87, 99, 86 by common division method
• Greatest Common Factor of 40, 21, 87, 99, 86 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 40

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

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

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 87

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

1,3,29,87

Factors of 99

List of positive integer factors of 99 that divides 99 without a remainder.

1,3,9,11,33,99

Factors of 86

List of positive integer factors of 86 that divides 86 without a remainder.

1,2,43,86

Greatest Common Factor

We found the factors 40,21,87,99,86 . The biggest common factor number is the GCF number.
So the greatest common factor 40,21,87,99,86 is 1.

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

• GCF of 87, 86, 59, 60, 33
• GCF of 71, 40, 38, 16, 61
• GCF of 56, 28, 54, 49, 90
• GCF of 70, 23, 39, 14, 10
• GCF of 41, 68, 19, 77, 68

1. What is the GCF of 40, 21, 87, 99, 86?

Answer: GCF of 40, 21, 87, 99, 86 is 1.

2. How to Find the GCF of 40, 21, 87, 99, 86

Answer: Greatest Common Factor(GCF) of 40, 21, 87, 99, 86 = 1

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

Step 2: Then multiply all the prime factors GCF(40, 21, 87, 99, 86) = 1.