Greatest Common Factor of 21, 15, 45, 73

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

• Greatest Common Factor of 21, 15, 45, 73 by common division method
• Greatest Common Factor of 21, 15, 45, 73 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 21

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

1,3,7,21

Factors of 15

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

1,3,5,15

Factors of 45

List of positive integer factors of 45 that divides 45 without a remainder.

1,3,5,9,15,45

Factors of 73

List of positive integer factors of 73 that divides 73 without a remainder.

1,73

Greatest Common Factor

We found the factors 21,15,45,73 . The biggest common factor number is the GCF number.
So the greatest common factor 21,15,45,73 is 1.

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

• GCF of 84, 39, 72, 14
• GCF of 97, 73, 16, 29
• GCF of 46, 48, 44, 67
• GCF of 55, 99, 41, 15
• GCF of 34, 44, 82, 46

1. What is the GCF of 21, 15, 45, 73?

Answer: GCF of 21, 15, 45, 73 is 1.

2. How to Find the GCF of 21, 15, 45, 73

Answer: Greatest Common Factor(GCF) of 21, 15, 45, 73 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 15, 45, 73) = 1.