Greatest Common Factor of 47, 49, 20, 638

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

• Greatest Common Factor of 47, 49, 20, 638 by common division method
• Greatest Common Factor of 47, 49, 20, 638 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 47

List of positive integer factors of 47 that divides 47 without a remainder.

1,47

Factors of 49

List of positive integer factors of 49 that divides 49 without a remainder.

1,7,49

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Factors of 638

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

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

Greatest Common Factor

We found the factors 47,49,20,638 . The biggest common factor number is the GCF number.
So the greatest common factor 47,49,20,638 is 1.

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

• GCF of 13, 73, 42, 222
• GCF of 49, 74, 90, 575
• GCF of 13, 64, 41, 434
• GCF of 61, 68, 27, 799
• GCF of 42, 58, 14, 787

1. What is the GCF of 47, 49, 20, 638?

Answer: GCF of 47, 49, 20, 638 is 1.

2. How to Find the GCF of 47, 49, 20, 638

Answer: Greatest Common Factor(GCF) of 47, 49, 20, 638 = 1

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

Step 2: Then multiply all the prime factors GCF(47, 49, 20, 638) = 1.