Greatest Common Factor of 20, 91, 30, 136

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

• Greatest Common Factor of 20, 91, 30, 136 by common division method
• Greatest Common Factor of 20, 91, 30, 136 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 91

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

1,7,13,91

Factors of 30

List of positive integer factors of 30 that divides 30 without a remainder.

1,2,3,5,6,10,15,30

Factors of 136

List of positive integer factors of 136 that divides 136 without a remainder.

1,2,4,8,17,34,68,136

Greatest Common Factor

We found the factors 20,91,30,136 . The biggest common factor number is the GCF number.
So the greatest common factor 20,91,30,136 is 1.

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

• GCF of 49, 56, 61, 511
• GCF of 57, 75, 61, 523
• GCF of 95, 93, 85, 837
• GCF of 74, 88, 89, 173
• GCF of 21, 69, 21, 570

1. What is the GCF of 20, 91, 30, 136?

Answer: GCF of 20, 91, 30, 136 is 1.

2. How to Find the GCF of 20, 91, 30, 136

Answer: Greatest Common Factor(GCF) of 20, 91, 30, 136 = 1

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

Step 2: Then multiply all the prime factors GCF(20, 91, 30, 136) = 1.