Greatest Common Factor of 61, 17, 13, 820

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

• Greatest Common Factor of 61, 17, 13, 820 by common division method
• Greatest Common Factor of 61, 17, 13, 820 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 17

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

1,17

Factors of 13

List of positive integer factors of 13 that divides 13 without a remainder.

1,13

Factors of 820

List of positive integer factors of 820 that divides 820 without a remainder.

1,2,4,5,10,20,41,82,164,205,410,820

Greatest Common Factor

We found the factors 61,17,13,820 . The biggest common factor number is the GCF number.
So the greatest common factor 61,17,13,820 is 1.

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

• GCF of 35, 41, 77, 751
• GCF of 49, 66, 85, 868
• GCF of 53, 94, 42, 777
• GCF of 87, 18, 98, 582
• GCF of 15, 68, 53, 634

1. What is the GCF of 61, 17, 13, 820?

Answer: GCF of 61, 17, 13, 820 is 1.

2. How to Find the GCF of 61, 17, 13, 820

Answer: Greatest Common Factor(GCF) of 61, 17, 13, 820 = 1

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

Step 2: Then multiply all the prime factors GCF(61, 17, 13, 820) = 1.