Greatest Common Factor of 72, 42, 49, 138

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

• Greatest Common Factor of 72, 42, 49, 138 by common division method
• Greatest Common Factor of 72, 42, 49, 138 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 72

List of positive integer factors of 72 that divides 72 without a remainder.

1,2,3,4,6,8,9,12,18,24,36,72

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 49

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

1,7,49

Factors of 138

List of positive integer factors of 138 that divides 138 without a remainder.

1,2,3,6,23,46,69,138

Greatest Common Factor

We found the factors 72,42,49,138 . The biggest common factor number is the GCF number.
So the greatest common factor 72,42,49,138 is 1.

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

• GCF of 43, 95, 94, 510
• GCF of 33, 65, 54, 314
• GCF of 72, 68, 99, 970
• GCF of 17, 67, 59, 167
• GCF of 34, 54, 48, 289

1. What is the GCF of 72, 42, 49, 138?

Answer: GCF of 72, 42, 49, 138 is 1.

2. How to Find the GCF of 72, 42, 49, 138

Answer: Greatest Common Factor(GCF) of 72, 42, 49, 138 = 1

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

Step 2: Then multiply all the prime factors GCF(72, 42, 49, 138) = 1.