Greatest Common Factor of 28, 65, 390

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

• Greatest Common Factor of 28, 65, 390 by common division method
• Greatest Common Factor of 28, 65, 390 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 390

List of positive integer factors of 390 that divides 390 without a remainder.

1,2,3,5,6,10,13,15,26,30,39,65,78,130,195,390

Greatest Common Factor

We found the factors 28,65,390 . The biggest common factor number is the GCF number.
So the greatest common factor 28,65,390 is 1.

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

• GCF of 81, 71, 678
• GCF of 65, 18, 612
• GCF of 71, 82, 146
• GCF of 71, 24, 196
• GCF of 51, 57, 464

1. What is the GCF of 28, 65, 390?

Answer: GCF of 28, 65, 390 is 1.

2. How to Find the GCF of 28, 65, 390

Answer: Greatest Common Factor(GCF) of 28, 65, 390 = 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, 390) = 1.