Greatest Common Factor of 870, 21, 670

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

• Greatest Common Factor of 870, 21, 670 by common division method
• Greatest Common Factor of 870, 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 870

List of positive integer factors of 870 that divides 870 without a remainder.

1,2,3,5,6,10,15,29,30,58,87,145,174,290,435,870

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 870,21,670 . The biggest common factor number is the GCF number.
So the greatest common factor 870,21,670 is 1.

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

• GCF of 311, 53, 890
• GCF of 492, 75, 124
• GCF of 405, 76, 343
• GCF of 455, 81, 595
• GCF of 520, 35, 711

1. What is the GCF of 870, 21, 670?

Answer: GCF of 870, 21, 670 is 1.

2. How to Find the GCF of 870, 21, 670

Answer: Greatest Common Factor(GCF) of 870, 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(870, 21, 670) = 1.