Greatest Common Factor of 13, 84, 78, 990

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

• Greatest Common Factor of 13, 84, 78, 990 by common division method
• Greatest Common Factor of 13, 84, 78, 990 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 13

List of positive integer factors of 13 that divides 13 without a remainder.

1,13

Factors of 84

List of positive integer factors of 84 that divides 84 without a remainder.

1,2,3,4,6,7,12,14,21,28,42,84

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 990

List of positive integer factors of 990 that divides 990 without a remainder.

1,2,3,5,6,9,10,11,15,18,22,30,33,45,55,66,90,99,110,165,198,330,495,990

Greatest Common Factor

We found the factors 13,84,78,990 . The biggest common factor number is the GCF number.
So the greatest common factor 13,84,78,990 is 1.

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

• GCF of 66, 64, 20, 790
• GCF of 90, 69, 45, 257
• GCF of 75, 97, 53, 436
• GCF of 52, 35, 38, 886
• GCF of 29, 15, 19, 103

1. What is the GCF of 13, 84, 78, 990?

Answer: GCF of 13, 84, 78, 990 is 1.

2. How to Find the GCF of 13, 84, 78, 990

Answer: Greatest Common Factor(GCF) of 13, 84, 78, 990 = 1

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

Step 2: Then multiply all the prime factors GCF(13, 84, 78, 990) = 1.