Greatest Common Factor of 28, 71, 840

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

• Greatest Common Factor of 28, 71, 840 by common division method
• Greatest Common Factor of 28, 71, 840 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 28

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

1,2,4,7,14,28

Factors of 71

List of positive integer factors of 71 that divides 71 without a remainder.

1,71

Factors of 840

List of positive integer factors of 840 that divides 840 without a remainder.

1,2,3,4,5,6,7,8,10,12,14,15,20,21,24,28,30,35,40,42,56,60,70,84,105,120,140,168,210,280,420,840

Greatest Common Factor

We found the factors 28,71,840 . The biggest common factor number is the GCF number.
So the greatest common factor 28,71,840 is 1.

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

• GCF of 22, 78, 749
• GCF of 82, 69, 577
• GCF of 95, 79, 779
• GCF of 36, 63, 480
• GCF of 79, 68, 675

1. What is the GCF of 28, 71, 840?

Answer: GCF of 28, 71, 840 is 1.

2. How to Find the GCF of 28, 71, 840

Answer: Greatest Common Factor(GCF) of 28, 71, 840 = 1

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

Step 2: Then multiply all the prime factors GCF(28, 71, 840) = 1.