Greatest Common Factor of 42, 85, 15, 646

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

• Greatest Common Factor of 42, 85, 15, 646 by common division method
• Greatest Common Factor of 42, 85, 15, 646 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 85

List of positive integer factors of 85 that divides 85 without a remainder.

1,5,17,85

Factors of 15

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

1,3,5,15

Factors of 646

List of positive integer factors of 646 that divides 646 without a remainder.

1,2,17,19,34,38,323,646

Greatest Common Factor

We found the factors 42,85,15,646 . The biggest common factor number is the GCF number.
So the greatest common factor 42,85,15,646 is 1.

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

• GCF of 73, 96, 39, 687
• GCF of 59, 50, 77, 511
• GCF of 98, 97, 64, 766
• GCF of 37, 89, 82, 522
• GCF of 67, 83, 19, 674

1. What is the GCF of 42, 85, 15, 646?

Answer: GCF of 42, 85, 15, 646 is 1.

2. How to Find the GCF of 42, 85, 15, 646

Answer: Greatest Common Factor(GCF) of 42, 85, 15, 646 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 85, 15, 646) = 1.