Greatest Common Factor of 45, 57, 40, 31

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

• Greatest Common Factor of 45, 57, 40, 31 by common division method
• Greatest Common Factor of 45, 57, 40, 31 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 57

List of positive integer factors of 57 that divides 57 without a remainder.

1,3,19,57

Factors of 40

List of positive integer factors of 40 that divides 40 without a remainder.

1,2,4,5,8,10,20,40

Factors of 31

List of positive integer factors of 31 that divides 31 without a remainder.

1,31

Greatest Common Factor

We found the factors 45,57,40,31 . The biggest common factor number is the GCF number.
So the greatest common factor 45,57,40,31 is 1.

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

• GCF of 57, 91, 59, 90
• GCF of 87, 88, 37, 93
• GCF of 27, 54, 45, 47
• GCF of 66, 74, 24, 39
• GCF of 20, 10, 34, 25

1. What is the GCF of 45, 57, 40, 31?

Answer: GCF of 45, 57, 40, 31 is 1.

2. How to Find the GCF of 45, 57, 40, 31

Answer: Greatest Common Factor(GCF) of 45, 57, 40, 31 = 1

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

Step 2: Then multiply all the prime factors GCF(45, 57, 40, 31) = 1.