Greatest Common Factor of 15, 20, 10, 63, 51

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

• Greatest Common Factor of 15, 20, 10, 63, 51 by common division method
• Greatest Common Factor of 15, 20, 10, 63, 51 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 15

List of positive integer factors of 15 that divides 15 without a remainder.

1,3,5,15

Factors of 20

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

1,2,4,5,10,20

Factors of 10

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

1,2,5,10

Factors of 63

List of positive integer factors of 63 that divides 63 without a remainder.

1,3,7,9,21,63

Factors of 51

List of positive integer factors of 51 that divides 51 without a remainder.

1,3,17,51

Greatest Common Factor

We found the factors 15,20,10,63,51 . The biggest common factor number is the GCF number.
So the greatest common factor 15,20,10,63,51 is 1.

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

• GCF of 14, 90, 45, 16, 39
• GCF of 25, 66, 53, 26, 40
• GCF of 44, 67, 29, 74, 61
• GCF of 41, 65, 76, 98, 18
• GCF of 10, 17, 13, 26, 95

1. What is the GCF of 15, 20, 10, 63, 51?

Answer: GCF of 15, 20, 10, 63, 51 is 1.

2. How to Find the GCF of 15, 20, 10, 63, 51

Answer: Greatest Common Factor(GCF) of 15, 20, 10, 63, 51 = 1

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

Step 2: Then multiply all the prime factors GCF(15, 20, 10, 63, 51) = 1.