Greatest Common Factor of 78, 20, 399

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

• Greatest Common Factor of 78, 20, 399 by common division method
• Greatest Common Factor of 78, 20, 399 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 78

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

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

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Factors of 399

List of positive integer factors of 399 that divides 399 without a remainder.

1,3,7,19,21,57,133,399

Greatest Common Factor

We found the factors 78,20,399 . The biggest common factor number is the GCF number.
So the greatest common factor 78,20,399 is 1.

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

• GCF of 28, 53, 354
• GCF of 90, 73, 961
• GCF of 87, 59, 172
• GCF of 78, 15, 149
• GCF of 95, 67, 813

1. What is the GCF of 78, 20, 399?

Answer: GCF of 78, 20, 399 is 1.

2. How to Find the GCF of 78, 20, 399

Answer: Greatest Common Factor(GCF) of 78, 20, 399 = 1

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

Step 2: Then multiply all the prime factors GCF(78, 20, 399) = 1.