Greatest Common Factor of 55, 78, 42, 839

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

• Greatest Common Factor of 55, 78, 42, 839 by common division method
• Greatest Common Factor of 55, 78, 42, 839 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 55

List of positive integer factors of 55 that divides 55 without a remainder.

1,5,11,55

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 42

List of positive integer factors of 42 that divides 42 without a remainder.

1,2,3,6,7,14,21,42

Factors of 839

List of positive integer factors of 839 that divides 839 without a remainder.

1,839

Greatest Common Factor

We found the factors 55,78,42,839 . The biggest common factor number is the GCF number.
So the greatest common factor 55,78,42,839 is 1.

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

• GCF of 82, 81, 16, 513
• GCF of 90, 29, 26, 231
• GCF of 85, 21, 10, 327
• GCF of 80, 19, 30, 208
• GCF of 22, 40, 93, 196

1. What is the GCF of 55, 78, 42, 839?

Answer: GCF of 55, 78, 42, 839 is 1.

2. How to Find the GCF of 55, 78, 42, 839

Answer: Greatest Common Factor(GCF) of 55, 78, 42, 839 = 1

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

Step 2: Then multiply all the prime factors GCF(55, 78, 42, 839) = 1.