Greatest Common Factor of 28, 65, 78, 920

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

• Greatest Common Factor of 28, 65, 78, 920 by common division method
• Greatest Common Factor of 28, 65, 78, 920 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 65

List of positive integer factors of 65 that divides 65 without a remainder.

1,5,13,65

Factors of 78

List of positive integer factors of 78 that divides 78 without a remainder.

1,2,3,6,13,26,39,78

Factors of 920

List of positive integer factors of 920 that divides 920 without a remainder.

1,2,4,5,8,10,20,23,40,46,92,115,184,230,460,920

Greatest Common Factor

We found the factors 28,65,78,920 . The biggest common factor number is the GCF number.
So the greatest common factor 28,65,78,920 is 1.

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

• GCF of 72, 42, 79, 682
• GCF of 45, 40, 13, 550
• GCF of 37, 43, 38, 145
• GCF of 44, 85, 15, 763
• GCF of 59, 35, 70, 363

1. What is the GCF of 28, 65, 78, 920?

Answer: GCF of 28, 65, 78, 920 is 1.

2. How to Find the GCF of 28, 65, 78, 920

Answer: Greatest Common Factor(GCF) of 28, 65, 78, 920 = 1

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

Step 2: Then multiply all the prime factors GCF(28, 65, 78, 920) = 1.