Greatest Common Factor of 20, 87, 61, 11

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

• Greatest Common Factor of 20, 87, 61, 11 by common division method
• Greatest Common Factor of 20, 87, 61, 11 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 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

Factors of 61

List of positive integer factors of 61 that divides 61 without a remainder.

1,61

Factors of 11

List of positive integer factors of 11 that divides 11 without a remainder.

1,11

Greatest Common Factor

We found the factors 20,87,61,11 . The biggest common factor number is the GCF number.
So the greatest common factor 20,87,61,11 is 1.

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

• GCF of 76, 36, 12, 74
• GCF of 93, 92, 92, 60
• GCF of 38, 70, 99, 55
• GCF of 72, 96, 85, 20
• GCF of 27, 95, 43, 46

1. What is the GCF of 20, 87, 61, 11?

Answer: GCF of 20, 87, 61, 11 is 1.

2. How to Find the GCF of 20, 87, 61, 11

Answer: Greatest Common Factor(GCF) of 20, 87, 61, 11 = 1

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

Step 2: Then multiply all the prime factors GCF(20, 87, 61, 11) = 1.