Greatest Common Factor of 61, 86, 20, 45

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

• Greatest Common Factor of 61, 86, 20, 45 by common division method
• Greatest Common Factor of 61, 86, 20, 45 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 61

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

1,61

Factors of 86

List of positive integer factors of 86 that divides 86 without a remainder.

1,2,43,86

Factors of 20

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

1,2,4,5,10,20

Factors of 45

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

1,3,5,9,15,45

Greatest Common Factor

We found the factors 61,86,20,45 . The biggest common factor number is the GCF number.
So the greatest common factor 61,86,20,45 is 1.

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

• GCF of 72, 99, 47, 13
• GCF of 37, 59, 78, 75
• GCF of 12, 87, 17, 73
• GCF of 22, 22, 31, 51
• GCF of 11, 32, 54, 33

1. What is the GCF of 61, 86, 20, 45?

Answer: GCF of 61, 86, 20, 45 is 1.

2. How to Find the GCF of 61, 86, 20, 45

Answer: Greatest Common Factor(GCF) of 61, 86, 20, 45 = 1

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

Step 2: Then multiply all the prime factors GCF(61, 86, 20, 45) = 1.