Greatest Common Factor of 21, 99, 78, 130

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

• Greatest Common Factor of 21, 99, 78, 130 by common division method
• Greatest Common Factor of 21, 99, 78, 130 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 21

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

1,3,7,21

Factors of 99

List of positive integer factors of 99 that divides 99 without a remainder.

1,3,9,11,33,99

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 130

List of positive integer factors of 130 that divides 130 without a remainder.

1,2,5,10,13,26,65,130

Greatest Common Factor

We found the factors 21,99,78,130 . The biggest common factor number is the GCF number.
So the greatest common factor 21,99,78,130 is 1.

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

• GCF of 88, 41, 50, 419
• GCF of 41, 52, 72, 935
• GCF of 82, 34, 30, 216
• GCF of 65, 43, 28, 948
• GCF of 41, 86, 11, 261

1. What is the GCF of 21, 99, 78, 130?

Answer: GCF of 21, 99, 78, 130 is 1.

2. How to Find the GCF of 21, 99, 78, 130

Answer: Greatest Common Factor(GCF) of 21, 99, 78, 130 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 99, 78, 130) = 1.