Greatest Common Factor of 42, 66, 57, 639

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

• Greatest Common Factor of 42, 66, 57, 639 by common division method
• Greatest Common Factor of 42, 66, 57, 639 with matching the biggest common factor

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

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 66

List of positive integer factors of 66 that divides 66 without a remainder.

1,2,3,6,11,22,33,66

Factors of 57

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

1,3,19,57

Factors of 639

List of positive integer factors of 639 that divides 639 without a remainder.

1,3,9,71,213,639

Greatest Common Factor

We found the factors 42,66,57,639 . The biggest common factor number is the GCF number.
So the greatest common factor 42,66,57,639 is 3.

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

• GCF of 64, 97, 74, 355
• GCF of 53, 11, 93, 658
• GCF of 70, 60, 33, 442
• GCF of 42, 15, 73, 649
• GCF of 47, 68, 44, 516

1. What is the GCF of 42, 66, 57, 639?

Answer: GCF of 42, 66, 57, 639 is 3.

2. How to Find the GCF of 42, 66, 57, 639

Answer: Greatest Common Factor(GCF) of 42, 66, 57, 639 = 3

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

Step 2: Then multiply all the prime factors GCF(42, 66, 57, 639) = 3.