Greatest Common Factor of 42, 70, 78, 423

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

• Greatest Common Factor of 42, 70, 78, 423 by common division method
• Greatest Common Factor of 42, 70, 78, 423 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 42

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

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

Factors of 70

List of positive integer factors of 70 that divides 70 without a remainder.

1,2,5,7,10,14,35,70

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 423

List of positive integer factors of 423 that divides 423 without a remainder.

1,3,9,47,141,423

Greatest Common Factor

We found the factors 42,70,78,423 . The biggest common factor number is the GCF number.
So the greatest common factor 42,70,78,423 is 1.

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

• GCF of 39, 74, 17, 760
• GCF of 50, 97, 87, 243
• GCF of 48, 36, 12, 149
• GCF of 35, 43, 70, 905
• GCF of 96, 59, 83, 299

1. What is the GCF of 42, 70, 78, 423?

Answer: GCF of 42, 70, 78, 423 is 1.

2. How to Find the GCF of 42, 70, 78, 423

Answer: Greatest Common Factor(GCF) of 42, 70, 78, 423 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 70, 78, 423) = 1.