Greatest Common Factor of 17, 88, 30, 21

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

• Greatest Common Factor of 17, 88, 30, 21 by common division method
• Greatest Common Factor of 17, 88, 30, 21 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 17

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

1,17

Factors of 88

List of positive integer factors of 88 that divides 88 without a remainder.

1,2,4,8,11,22,44,88

Factors of 30

List of positive integer factors of 30 that divides 30 without a remainder.

1,2,3,5,6,10,15,30

Factors of 21

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

1,3,7,21

Greatest Common Factor

We found the factors 17,88,30,21 . The biggest common factor number is the GCF number.
So the greatest common factor 17,88,30,21 is 1.

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

• GCF of 61, 36, 81, 64
• GCF of 61, 45, 57, 99
• GCF of 65, 94, 69, 79
• GCF of 19, 83, 26, 41
• GCF of 10, 23, 46, 22

1. What is the GCF of 17, 88, 30, 21?

Answer: GCF of 17, 88, 30, 21 is 1.

2. How to Find the GCF of 17, 88, 30, 21

Answer: Greatest Common Factor(GCF) of 17, 88, 30, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(17, 88, 30, 21) = 1.