Greatest Common Factor of 78, 17, 72, 49

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

• Greatest Common Factor of 78, 17, 72, 49 by common division method
• Greatest Common Factor of 78, 17, 72, 49 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 17

List of positive integer factors of 17 that divides 17 without a remainder.

1,17

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 49

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

1,7,49

Greatest Common Factor

We found the factors 78,17,72,49 . The biggest common factor number is the GCF number.
So the greatest common factor 78,17,72,49 is 1.

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

• GCF of 42, 38, 97, 89
• GCF of 61, 18, 20, 97
• GCF of 60, 80, 53, 98
• GCF of 25, 60, 87, 59
• GCF of 43, 70, 14, 62

1. What is the GCF of 78, 17, 72, 49?

Answer: GCF of 78, 17, 72, 49 is 1.

2. How to Find the GCF of 78, 17, 72, 49

Answer: Greatest Common Factor(GCF) of 78, 17, 72, 49 = 1

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

Step 2: Then multiply all the prime factors GCF(78, 17, 72, 49) = 1.