Greatest Common Factor of 45, 42, 17, 809

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

• Greatest Common Factor of 45, 42, 17, 809 by common division method
• Greatest Common Factor of 45, 42, 17, 809 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 45

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

1,3,5,9,15,45

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 17

List of positive integer factors of 17 that divides 17 without a remainder.

1,17

Factors of 809

List of positive integer factors of 809 that divides 809 without a remainder.

1,809

Greatest Common Factor

We found the factors 45,42,17,809 . The biggest common factor number is the GCF number.
So the greatest common factor 45,42,17,809 is 1.

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

• GCF of 43, 31, 91, 343
• GCF of 74, 42, 65, 575
• GCF of 42, 46, 29, 437
• GCF of 53, 69, 30, 510
• GCF of 55, 32, 97, 736

1. What is the GCF of 45, 42, 17, 809?

Answer: GCF of 45, 42, 17, 809 is 1.

2. How to Find the GCF of 45, 42, 17, 809

Answer: Greatest Common Factor(GCF) of 45, 42, 17, 809 = 1

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

Step 2: Then multiply all the prime factors GCF(45, 42, 17, 809) = 1.