Greatest Common Factor of 81, 55, 21, 552

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

• Greatest Common Factor of 81, 55, 21, 552 by common division method
• Greatest Common Factor of 81, 55, 21, 552 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 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Factors of 55

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

1,5,11,55

Factors of 21

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

1,3,7,21

Factors of 552

List of positive integer factors of 552 that divides 552 without a remainder.

1,2,3,4,6,8,12,23,24,46,69,92,138,184,276,552

Greatest Common Factor

We found the factors 81,55,21,552 . The biggest common factor number is the GCF number.
So the greatest common factor 81,55,21,552 is 1.

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

• GCF of 20, 69, 44, 540
• GCF of 30, 64, 98, 263
• GCF of 48, 81, 36, 492
• GCF of 78, 19, 31, 542
• GCF of 97, 96, 80, 385

1. What is the GCF of 81, 55, 21, 552?

Answer: GCF of 81, 55, 21, 552 is 1.

2. How to Find the GCF of 81, 55, 21, 552

Answer: Greatest Common Factor(GCF) of 81, 55, 21, 552 = 1

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

Step 2: Then multiply all the prime factors GCF(81, 55, 21, 552) = 1.