Greatest Common Factor of 97, 42, 91, 639

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

• Greatest Common Factor of 97, 42, 91, 639 by common division method
• Greatest Common Factor of 97, 42, 91, 639 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 97

List of positive integer factors of 97 that divides 97 without a remainder.

1,97

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 91

List of positive integer factors of 91 that divides 91 without a remainder.

1,7,13,91

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 97,42,91,639 . The biggest common factor number is the GCF number.
So the greatest common factor 97,42,91,639 is 1.

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

• GCF of 38, 72, 59, 723
• GCF of 26, 66, 34, 265
• GCF of 38, 10, 32, 629
• GCF of 82, 22, 47, 576
• GCF of 36, 24, 29, 490

1. What is the GCF of 97, 42, 91, 639?

Answer: GCF of 97, 42, 91, 639 is 1.

2. How to Find the GCF of 97, 42, 91, 639

Answer: Greatest Common Factor(GCF) of 97, 42, 91, 639 = 1

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

Step 2: Then multiply all the prime factors GCF(97, 42, 91, 639) = 1.