Greatest Common Factor of 42, 81, 98, 646

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

• Greatest Common Factor of 42, 81, 98, 646 by common division method
• Greatest Common Factor of 42, 81, 98, 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 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Factors of 98

List of positive integer factors of 98 that divides 98 without a remainder.

1,2,7,14,49,98

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 42,81,98,646 . The biggest common factor number is the GCF number.
So the greatest common factor 42,81,98,646 is 1.

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

• GCF of 28, 87, 73, 626
• GCF of 23, 15, 10, 503
• GCF of 93, 98, 87, 122
• GCF of 80, 23, 52, 801
• GCF of 42, 90, 23, 937

1. What is the GCF of 42, 81, 98, 646?

Answer: GCF of 42, 81, 98, 646 is 1.

2. How to Find the GCF of 42, 81, 98, 646

Answer: Greatest Common Factor(GCF) of 42, 81, 98, 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, 81, 98, 646) = 1.