Greatest Common Factor of 30, 21, 670

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

• Greatest Common Factor of 30, 21, 670 by common division method
• Greatest Common Factor of 30, 21, 670 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 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

Factors of 670

List of positive integer factors of 670 that divides 670 without a remainder.

1,2,5,10,67,134,335,670

Greatest Common Factor

We found the factors 30,21,670 . The biggest common factor number is the GCF number.
So the greatest common factor 30,21,670 is 1.

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

• GCF of 85, 80, 945
• GCF of 10, 57, 474
• GCF of 32, 45, 221
• GCF of 96, 69, 825
• GCF of 87, 20, 182

1. What is the GCF of 30, 21, 670?

Answer: GCF of 30, 21, 670 is 1.

2. How to Find the GCF of 30, 21, 670

Answer: Greatest Common Factor(GCF) of 30, 21, 670 = 1

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

Step 2: Then multiply all the prime factors GCF(30, 21, 670) = 1.