Greatest Common Factor of 42, 38, 45, 455

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

• Greatest Common Factor of 42, 38, 45, 455 by common division method
• Greatest Common Factor of 42, 38, 45, 455 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 38

List of positive integer factors of 38 that divides 38 without a remainder.

1,2,19,38

Factors of 45

List of positive integer factors of 45 that divides 45 without a remainder.

1,3,5,9,15,45

Factors of 455

List of positive integer factors of 455 that divides 455 without a remainder.

1,5,7,13,35,65,91,455

Greatest Common Factor

We found the factors 42,38,45,455 . The biggest common factor number is the GCF number.
So the greatest common factor 42,38,45,455 is 1.

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

• GCF of 53, 28, 82, 704
• GCF of 93, 27, 61, 588
• GCF of 56, 75, 19, 840
• GCF of 13, 19, 10, 181
• GCF of 55, 29, 84, 471

1. What is the GCF of 42, 38, 45, 455?

Answer: GCF of 42, 38, 45, 455 is 1.

2. How to Find the GCF of 42, 38, 45, 455

Answer: Greatest Common Factor(GCF) of 42, 38, 45, 455 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 38, 45, 455) = 1.