Greatest Common Factor of 78, 21, 819

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

• Greatest Common Factor of 78, 21, 819 by common division method
• Greatest Common Factor of 78, 21, 819 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ So the GCF of the given numbers is 3 = 3

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 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 819

List of positive integer factors of 819 that divides 819 without a remainder.

1,3,7,9,13,21,39,63,91,117,273,819

Greatest Common Factor

We found the factors 78,21,819 . The biggest common factor number is the GCF number.
So the greatest common factor 78,21,819 is 3.

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

• GCF of 48, 14, 557
• GCF of 77, 99, 789
• GCF of 23, 61, 516
• GCF of 96, 16, 389
• GCF of 89, 36, 196

1. What is the GCF of 78, 21, 819?

Answer: GCF of 78, 21, 819 is 3.

2. How to Find the GCF of 78, 21, 819

Answer: Greatest Common Factor(GCF) of 78, 21, 819 = 3

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

Step 2: Then multiply all the prime factors GCF(78, 21, 819) = 3.