Greatest Common Factor of 19, 36, 20, 4, 81

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

• Greatest Common Factor of 19, 36, 20, 4, 81 by common division method
• Greatest Common Factor of 19, 36, 20, 4, 81 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 19

List of positive integer factors of 19 that divides 19 without a remainder.

1,19

Factors of 36

List of positive integer factors of 36 that divides 36 without a remainder.

1,2,3,4,6,9,12,18,36

Factors of 20

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

1,2,4,5,10,20

Factors of 4

List of positive integer factors of 4 that divides 4 without a remainder.

1,2,4

Factors of 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Greatest Common Factor

We found the factors 19,36,20,4,81 . The biggest common factor number is the GCF number.
So the greatest common factor 19,36,20,4,81 is 1.

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

• GCF of 46, 48, 80, 8, 67
• GCF of 63, 40, 45, 1, 82
• GCF of 28, 64, 87, 6, 65
• GCF of 95, 72, 51, 3, 31
• GCF of 44, 71, 33, 3, 98

1. What is the GCF of 19, 36, 20, 4, 81?

Answer: GCF of 19, 36, 20, 4, 81 is 1.

2. How to Find the GCF of 19, 36, 20, 4, 81

Answer: Greatest Common Factor(GCF) of 19, 36, 20, 4, 81 = 1

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

Step 2: Then multiply all the prime factors GCF(19, 36, 20, 4, 81) = 1.