Greatest Common Factor of 21, 27, 55, 510

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

• Greatest Common Factor of 21, 27, 55, 510 by common division method
• Greatest Common Factor of 21, 27, 55, 510 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 27

List of positive integer factors of 27 that divides 27 without a remainder.

1,3,9,27

Factors of 55

List of positive integer factors of 55 that divides 55 without a remainder.

1,5,11,55

Factors of 510

List of positive integer factors of 510 that divides 510 without a remainder.

1,2,3,5,6,10,15,17,30,34,51,85,102,170,255,510

Greatest Common Factor

We found the factors 21,27,55,510 . The biggest common factor number is the GCF number.
So the greatest common factor 21,27,55,510 is 1.

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

• GCF of 34, 72, 92, 308
• GCF of 90, 10, 29, 700
• GCF of 57, 79, 76, 470
• GCF of 29, 39, 31, 412
• GCF of 22, 53, 46, 119

1. What is the GCF of 21, 27, 55, 510?

Answer: GCF of 21, 27, 55, 510 is 1.

2. How to Find the GCF of 21, 27, 55, 510

Answer: Greatest Common Factor(GCF) of 21, 27, 55, 510 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 27, 55, 510) = 1.