Greatest Common Factor of 20, 68, 72, 45, 851

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

• Greatest Common Factor of 20, 68, 72, 45, 851 by common division method
• Greatest Common Factor of 20, 68, 72, 45, 851 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 68

List of positive integer factors of 68 that divides 68 without a remainder.

1,2,4,17,34,68

Factors of 72

List of positive integer factors of 72 that divides 72 without a remainder.

1,2,3,4,6,8,9,12,18,24,36,72

Factors of 45

List of positive integer factors of 45 that divides 45 without a remainder.

1,3,5,9,15,45

Factors of 851

List of positive integer factors of 851 that divides 851 without a remainder.

1,23,37,851

Greatest Common Factor

We found the factors 20,68,72,45,851 . The biggest common factor number is the GCF number.
So the greatest common factor 20,68,72,45,851 is 1.

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

• GCF of 75, 17, 88, 20, 865
• GCF of 11, 82, 12, 26, 256
• GCF of 27, 27, 36, 89, 471
• GCF of 90, 91, 96, 72, 507
• GCF of 46, 95, 77, 70, 254

1. What is the GCF of 20, 68, 72, 45, 851?

Answer: GCF of 20, 68, 72, 45, 851 is 1.

2. How to Find the GCF of 20, 68, 72, 45, 851

Answer: Greatest Common Factor(GCF) of 20, 68, 72, 45, 851 = 1

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

Step 2: Then multiply all the prime factors GCF(20, 68, 72, 45, 851) = 1.