Greatest Common Factor of 42, 20, 65, 457

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

• Greatest Common Factor of 42, 20, 65, 457 by common division method
• Greatest Common Factor of 42, 20, 65, 457 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 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Factors of 65

List of positive integer factors of 65 that divides 65 without a remainder.

1,5,13,65

Factors of 457

List of positive integer factors of 457 that divides 457 without a remainder.

1,457

Greatest Common Factor

We found the factors 42,20,65,457 . The biggest common factor number is the GCF number.
So the greatest common factor 42,20,65,457 is 1.

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

• GCF of 10, 32, 42, 426
• GCF of 60, 87, 47, 426
• GCF of 56, 99, 89, 520
• GCF of 52, 63, 30, 601
• GCF of 21, 28, 70, 615

1. What is the GCF of 42, 20, 65, 457?

Answer: GCF of 42, 20, 65, 457 is 1.

2. How to Find the GCF of 42, 20, 65, 457

Answer: Greatest Common Factor(GCF) of 42, 20, 65, 457 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 20, 65, 457) = 1.