Greatest Common Factor of 45, 72, 138

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

• Greatest Common Factor of 45, 72, 138 by common division method
• Greatest Common Factor of 45, 72, 138 with matching the biggest common factor

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∴ So the GCF of the given numbers is 3 = 3

Factors of 45

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

1,3,5,9,15,45

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 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 45,72,138 . The biggest common factor number is the GCF number.
So the greatest common factor 45,72,138 is 3.

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

• GCF of 55, 57, 326
• GCF of 43, 10, 474
• GCF of 67, 60, 234
• GCF of 69, 94, 766
• GCF of 62, 52, 586

1. What is the GCF of 45, 72, 138?

Answer: GCF of 45, 72, 138 is 3.

2. How to Find the GCF of 45, 72, 138

Answer: Greatest Common Factor(GCF) of 45, 72, 138 = 3

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

Step 2: Then multiply all the prime factors GCF(45, 72, 138) = 3.