Greatest Common Factor of 16, 19, 21, 491

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

• Greatest Common Factor of 16, 19, 21, 491 by common division method
• Greatest Common Factor of 16, 19, 21, 491 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 19

List of positive integer factors of 19 that divides 19 without a remainder.

1,19

Factors of 21

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

1,3,7,21

Factors of 491

List of positive integer factors of 491 that divides 491 without a remainder.

1,491

Greatest Common Factor

We found the factors 16,19,21,491 . The biggest common factor number is the GCF number.
So the greatest common factor 16,19,21,491 is 1.

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

• GCF of 55, 99, 36, 531
• GCF of 96, 84, 90, 971
• GCF of 82, 11, 32, 302
• GCF of 28, 96, 21, 267
• GCF of 68, 72, 48, 198

1. What is the GCF of 16, 19, 21, 491?

Answer: GCF of 16, 19, 21, 491 is 1.

2. How to Find the GCF of 16, 19, 21, 491

Answer: Greatest Common Factor(GCF) of 16, 19, 21, 491 = 1

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

Step 2: Then multiply all the prime factors GCF(16, 19, 21, 491) = 1.