Greatest Common Factor of 42, 16, 257

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

• Greatest Common Factor of 42, 16, 257 by common division method
• Greatest Common Factor of 42, 16, 257 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 16

List of positive integer factors of 16 that divides 16 without a remainder.

1,2,4,8,16

Factors of 257

List of positive integer factors of 257 that divides 257 without a remainder.

1,257

Greatest Common Factor

We found the factors 42,16,257 . The biggest common factor number is the GCF number.
So the greatest common factor 42,16,257 is 1.

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

• GCF of 74, 37, 684
• GCF of 22, 41, 263
• GCF of 73, 86, 986
• GCF of 78, 51, 625
• GCF of 77, 12, 554

1. What is the GCF of 42, 16, 257?

Answer: GCF of 42, 16, 257 is 1.

2. How to Find the GCF of 42, 16, 257

Answer: Greatest Common Factor(GCF) of 42, 16, 257 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 16, 257) = 1.