Greatest Common Factor of 57, 81, 42, 768

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

• Greatest Common Factor of 57, 81, 42, 768 by common division method
• Greatest Common Factor of 57, 81, 42, 768 with matching the biggest common factor

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∴ So the GCF of the given numbers is 3 = 3

Factors of 57

List of positive integer factors of 57 that divides 57 without a remainder.

1,3,19,57

Factors of 81

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

1,3,9,27,81

Factors of 42

List of positive integer factors of 42 that divides 42 without a remainder.

1,2,3,6,7,14,21,42

Factors of 768

List of positive integer factors of 768 that divides 768 without a remainder.

1,2,3,4,6,8,12,16,24,32,48,64,96,128,192,256,384,768

Greatest Common Factor

We found the factors 57,81,42,768 . The biggest common factor number is the GCF number.
So the greatest common factor 57,81,42,768 is 3.

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

• GCF of 47, 20, 42, 328
• GCF of 80, 20, 11, 850
• GCF of 78, 79, 89, 593
• GCF of 11, 94, 57, 996
• GCF of 28, 24, 38, 360

1. What is the GCF of 57, 81, 42, 768?

Answer: GCF of 57, 81, 42, 768 is 3.

2. How to Find the GCF of 57, 81, 42, 768

Answer: Greatest Common Factor(GCF) of 57, 81, 42, 768 = 3

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

Step 2: Then multiply all the prime factors GCF(57, 81, 42, 768) = 3.