Greatest Common Factor of 21, 17, 16, 555

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

• Greatest Common Factor of 21, 17, 16, 555 by common division method
• Greatest Common Factor of 21, 17, 16, 555 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 17

List of positive integer factors of 17 that divides 17 without a remainder.

1,17

Factors of 16

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

1,2,4,8,16

Factors of 555

List of positive integer factors of 555 that divides 555 without a remainder.

1,3,5,15,37,111,185,555

Greatest Common Factor

We found the factors 21,17,16,555 . The biggest common factor number is the GCF number.
So the greatest common factor 21,17,16,555 is 1.

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

• GCF of 73, 27, 34, 143
• GCF of 94, 40, 28, 259
• GCF of 25, 23, 31, 114
• GCF of 82, 21, 43, 844
• GCF of 95, 16, 98, 249

1. What is the GCF of 21, 17, 16, 555?

Answer: GCF of 21, 17, 16, 555 is 1.

2. How to Find the GCF of 21, 17, 16, 555

Answer: Greatest Common Factor(GCF) of 21, 17, 16, 555 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 17, 16, 555) = 1.