Greatest Common Factor of 138, 391, 90

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

• Greatest Common Factor of 138, 391, 90 by common division method
• Greatest Common Factor of 138, 391, 90 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 138

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

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

Factors of 391

List of positive integer factors of 391 that divides 391 without a remainder.

1,17,23,391

Factors of 90

List of positive integer factors of 90 that divides 90 without a remainder.

1,2,3,5,6,9,10,15,18,30,45,90

Greatest Common Factor

We found the factors 138,391,90 . The biggest common factor number is the GCF number.
So the greatest common factor 138,391,90 is 1.

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

• GCF of 485, 499, 47
• GCF of 523, 305, 87
• GCF of 868, 243, 91
• GCF of 979, 805, 33
• GCF of 100, 658, 26

1. What is the GCF of 138, 391, 90?

Answer: GCF of 138, 391, 90 is 1.

2. How to Find the GCF of 138, 391, 90

Answer: Greatest Common Factor(GCF) of 138, 391, 90 = 1

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

Step 2: Then multiply all the prime factors GCF(138, 391, 90) = 1.