Greatest Common Factor of 15, 73, 78, 56, 42

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

• Greatest Common Factor of 15, 73, 78, 56, 42 by common division method
• Greatest Common Factor of 15, 73, 78, 56, 42 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 15

List of positive integer factors of 15 that divides 15 without a remainder.

1,3,5,15

Factors of 73

List of positive integer factors of 73 that divides 73 without a remainder.

1,73

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 56

List of positive integer factors of 56 that divides 56 without a remainder.

1,2,4,7,8,14,28,56

Factors of 42

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

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

Greatest Common Factor

We found the factors 15,73,78,56,42 . The biggest common factor number is the GCF number.
So the greatest common factor 15,73,78,56,42 is 1.

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

• GCF of 99, 96, 88, 95, 69
• GCF of 44, 20, 96, 99, 49
• GCF of 68, 79, 82, 64, 77
• GCF of 68, 26, 30, 15, 53
• GCF of 13, 91, 45, 91, 85

1. What is the GCF of 15, 73, 78, 56, 42?

Answer: GCF of 15, 73, 78, 56, 42 is 1.

2. How to Find the GCF of 15, 73, 78, 56, 42

Answer: Greatest Common Factor(GCF) of 15, 73, 78, 56, 42 = 1

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

Step 2: Then multiply all the prime factors GCF(15, 73, 78, 56, 42) = 1.