Greatest Common Factor of 10, 21, 81, 43, 57

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

• Greatest Common Factor of 10, 21, 81, 43, 57 by common division method
• Greatest Common Factor of 10, 21, 81, 43, 57 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 10

List of positive integer factors of 10 that divides 10 without a remainder.

1,2,5,10

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 81

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

1,3,9,27,81

Factors of 43

List of positive integer factors of 43 that divides 43 without a remainder.

1,43

Factors of 57

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

1,3,19,57

Greatest Common Factor

We found the factors 10,21,81,43,57 . The biggest common factor number is the GCF number.
So the greatest common factor 10,21,81,43,57 is 1.

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

• GCF of 93, 52, 45, 67, 19
• GCF of 23, 64, 56, 58, 97
• GCF of 74, 29, 14, 48, 88
• GCF of 50, 54, 16, 30, 13
• GCF of 71, 37, 31, 31, 82

1. What is the GCF of 10, 21, 81, 43, 57?

Answer: GCF of 10, 21, 81, 43, 57 is 1.

2. How to Find the GCF of 10, 21, 81, 43, 57

Answer: Greatest Common Factor(GCF) of 10, 21, 81, 43, 57 = 1

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

Step 2: Then multiply all the prime factors GCF(10, 21, 81, 43, 57) = 1.