Greatest Common Factor of 78, 138, 221

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

• Greatest Common Factor of 78, 138, 221 by common division method
• Greatest Common Factor of 78, 138, 221 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 78

List of positive integer factors of 78 that divides 78 without a remainder.

1,2,3,6,13,26,39,78

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 221

List of positive integer factors of 221 that divides 221 without a remainder.

1,13,17,221

Greatest Common Factor

We found the factors 78,138,221 . The biggest common factor number is the GCF number.
So the greatest common factor 78,138,221 is 1.

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

• GCF of 85, 987, 538
• GCF of 87, 614, 812
• GCF of 87, 179, 126
• GCF of 92, 455, 508
• GCF of 63, 124, 280

1. What is the GCF of 78, 138, 221?

Answer: GCF of 78, 138, 221 is 1.

2. How to Find the GCF of 78, 138, 221

Answer: Greatest Common Factor(GCF) of 78, 138, 221 = 1

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

Step 2: Then multiply all the prime factors GCF(78, 138, 221) = 1.