Greatest Common Factor of 91, 16, 42, 638

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

• Greatest Common Factor of 91, 16, 42, 638 by common division method
• Greatest Common Factor of 91, 16, 42, 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 91

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

1,7,13,91

Factors of 16

List of positive integer factors of 16 that divides 16 without a remainder.

1,2,4,8,16

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 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 91,16,42,638 . The biggest common factor number is the GCF number.
So the greatest common factor 91,16,42,638 is 1.

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

• GCF of 25, 59, 51, 440
• GCF of 26, 22, 66, 127
• GCF of 43, 81, 62, 376
• GCF of 53, 93, 88, 693
• GCF of 24, 59, 12, 616

1. What is the GCF of 91, 16, 42, 638?

Answer: GCF of 91, 16, 42, 638 is 1.

2. How to Find the GCF of 91, 16, 42, 638

Answer: Greatest Common Factor(GCF) of 91, 16, 42, 638 = 1

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

Step 2: Then multiply all the prime factors GCF(91, 16, 42, 638) = 1.