Greatest Common Factor of 16, 9, 57, 21

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

• Greatest Common Factor of 16, 9, 57, 21 by common division method
• Greatest Common Factor of 16, 9, 57, 21 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 16

List of positive integer factors of 16 that divides 16 without a remainder.

1,2,4,8,16

Factors of 9

List of positive integer factors of 9 that divides 9 without a remainder.

1,3,9

Factors of 57

List of positive integer factors of 57 that divides 57 without a remainder.

1,3,19,57

Factors of 21

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

1,3,7,21

Greatest Common Factor

We found the factors 16,9,57,21 . The biggest common factor number is the GCF number.
So the greatest common factor 16,9,57,21 is 1.

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

• GCF of 74, 3, 24, 28
• GCF of 79, 1, 46, 25
• GCF of 17, 5, 96, 95
• GCF of 49, 5, 71, 24
• GCF of 19, 8, 70, 71

1. What is the GCF of 16, 9, 57, 21?

Answer: GCF of 16, 9, 57, 21 is 1.

2. How to Find the GCF of 16, 9, 57, 21

Answer: Greatest Common Factor(GCF) of 16, 9, 57, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(16, 9, 57, 21) = 1.