Greatest Common Factor of 16, 21, 455

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

• Greatest Common Factor of 16, 21, 455 by common division method
• Greatest Common Factor of 16, 21, 455 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 21

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

1,3,7,21

Factors of 455

List of positive integer factors of 455 that divides 455 without a remainder.

1,5,7,13,35,65,91,455

Greatest Common Factor

We found the factors 16,21,455 . The biggest common factor number is the GCF number.
So the greatest common factor 16,21,455 is 1.

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

• GCF of 27, 21, 369
• GCF of 75, 57, 227
• GCF of 73, 54, 223
• GCF of 61, 34, 229
• GCF of 80, 85, 700

1. What is the GCF of 16, 21, 455?

Answer: GCF of 16, 21, 455 is 1.

2. How to Find the GCF of 16, 21, 455

Answer: Greatest Common Factor(GCF) of 16, 21, 455 = 1

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

Step 2: Then multiply all the prime factors GCF(16, 21, 455) = 1.