Greatest Common Factor of 638, 45, 42

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

• Greatest Common Factor of 638, 45, 42 by common division method
• Greatest Common Factor of 638, 45, 42 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 638

List of positive integer factors of 638 that divides 638 without a remainder.

1,2,11,22,29,58,319,638

Factors of 45

List of positive integer factors of 45 that divides 45 without a remainder.

1,3,5,9,15,45

Factors of 42

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

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

Greatest Common Factor

We found the factors 638,45,42 . The biggest common factor number is the GCF number.
So the greatest common factor 638,45,42 is 1.

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

• GCF of 803, 64, 11
• GCF of 699, 14, 94
• GCF of 412, 43, 71
• GCF of 670, 11, 98
• GCF of 794, 30, 23

1. What is the GCF of 638, 45, 42?

Answer: GCF of 638, 45, 42 is 1.

2. How to Find the GCF of 638, 45, 42

Answer: Greatest Common Factor(GCF) of 638, 45, 42 = 1

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

Step 2: Then multiply all the prime factors GCF(638, 45, 42) = 1.