Greatest Common Factor of 30, 57, 80, 84, 61

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

• Greatest Common Factor of 30, 57, 80, 84, 61 by common division method
• Greatest Common Factor of 30, 57, 80, 84, 61 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 30

List of positive integer factors of 30 that divides 30 without a remainder.

1,2,3,5,6,10,15,30

Factors of 57

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

1,3,19,57

Factors of 80

List of positive integer factors of 80 that divides 80 without a remainder.

1,2,4,5,8,10,16,20,40,80

Factors of 84

List of positive integer factors of 84 that divides 84 without a remainder.

1,2,3,4,6,7,12,14,21,28,42,84

Factors of 61

List of positive integer factors of 61 that divides 61 without a remainder.

1,61

Greatest Common Factor

We found the factors 30,57,80,84,61 . The biggest common factor number is the GCF number.
So the greatest common factor 30,57,80,84,61 is 1.

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

• GCF of 77, 47, 79, 86, 91
• GCF of 12, 28, 55, 74, 88
• GCF of 94, 75, 71, 89, 18
• GCF of 94, 57, 37, 28, 78
• GCF of 22, 70, 99, 20, 33

1. What is the GCF of 30, 57, 80, 84, 61?

Answer: GCF of 30, 57, 80, 84, 61 is 1.

2. How to Find the GCF of 30, 57, 80, 84, 61

Answer: Greatest Common Factor(GCF) of 30, 57, 80, 84, 61 = 1

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

Step 2: Then multiply all the prime factors GCF(30, 57, 80, 84, 61) = 1.