Greatest Common Factor of 21, 15, 67, 99

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

• Greatest Common Factor of 21, 15, 67, 99 by common division method
• Greatest Common Factor of 21, 15, 67, 99 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 15

List of positive integer factors of 15 that divides 15 without a remainder.

1,3,5,15

Factors of 67

List of positive integer factors of 67 that divides 67 without a remainder.

1,67

Factors of 99

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

1,3,9,11,33,99

Greatest Common Factor

We found the factors 21,15,67,99 . The biggest common factor number is the GCF number.
So the greatest common factor 21,15,67,99 is 1.

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

• GCF of 56, 38, 56, 51
• GCF of 35, 57, 45, 32
• GCF of 48, 31, 34, 29
• GCF of 77, 62, 29, 66
• GCF of 93, 69, 75, 80

1. What is the GCF of 21, 15, 67, 99?

Answer: GCF of 21, 15, 67, 99 is 1.

2. How to Find the GCF of 21, 15, 67, 99

Answer: Greatest Common Factor(GCF) of 21, 15, 67, 99 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 15, 67, 99) = 1.