Greatest Common Factor of 42, 78, 19, 961

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

• Greatest Common Factor of 42, 78, 19, 961 by common division method
• Greatest Common Factor of 42, 78, 19, 961 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 78

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

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

Factors of 19

List of positive integer factors of 19 that divides 19 without a remainder.

1,19

Factors of 961

List of positive integer factors of 961 that divides 961 without a remainder.

1,31,961

Greatest Common Factor

We found the factors 42,78,19,961 . The biggest common factor number is the GCF number.
So the greatest common factor 42,78,19,961 is 1.

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

• GCF of 71, 70, 28, 553
• GCF of 62, 83, 92, 418
• GCF of 43, 38, 39, 326
• GCF of 64, 51, 56, 721
• GCF of 56, 99, 99, 399

1. What is the GCF of 42, 78, 19, 961?

Answer: GCF of 42, 78, 19, 961 is 1.

2. How to Find the GCF of 42, 78, 19, 961

Answer: Greatest Common Factor(GCF) of 42, 78, 19, 961 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 78, 19, 961) = 1.