Greatest Common Factor of 21, 88, 690

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

• Greatest Common Factor of 21, 88, 690 by common division method
• Greatest Common Factor of 21, 88, 690 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 88

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

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

Factors of 690

List of positive integer factors of 690 that divides 690 without a remainder.

1,2,3,5,6,10,15,23,30,46,69,115,138,230,345,690

Greatest Common Factor

We found the factors 21,88,690 . The biggest common factor number is the GCF number.
So the greatest common factor 21,88,690 is 1.

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

• GCF of 84, 79, 474
• GCF of 21, 60, 615
• GCF of 15, 66, 342
• GCF of 80, 88, 582
• GCF of 12, 91, 423

1. What is the GCF of 21, 88, 690?

Answer: GCF of 21, 88, 690 is 1.

2. How to Find the GCF of 21, 88, 690

Answer: Greatest Common Factor(GCF) of 21, 88, 690 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 88, 690) = 1.