Greatest Common Factor of 61, 18, 20, 320

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

• Greatest Common Factor of 61, 18, 20, 320 by common division method
• Greatest Common Factor of 61, 18, 20, 320 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 18

List of positive integer factors of 18 that divides 18 without a remainder.

1,2,3,6,9,18

Factors of 20

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

1,2,4,5,10,20

Factors of 320

List of positive integer factors of 320 that divides 320 without a remainder.

1,2,4,5,8,10,16,20,32,40,64,80,160,320

Greatest Common Factor

We found the factors 61,18,20,320 . The biggest common factor number is the GCF number.
So the greatest common factor 61,18,20,320 is 1.

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

• GCF of 39, 59, 74, 141
• GCF of 99, 35, 83, 101
• GCF of 85, 10, 62, 360
• GCF of 12, 59, 44, 146
• GCF of 86, 58, 31, 704

1. What is the GCF of 61, 18, 20, 320?

Answer: GCF of 61, 18, 20, 320 is 1.

2. How to Find the GCF of 61, 18, 20, 320

Answer: Greatest Common Factor(GCF) of 61, 18, 20, 320 = 1

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

Step 2: Then multiply all the prime factors GCF(61, 18, 20, 320) = 1.