Greatest Common Factor of 630, 975, 21

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

• Greatest Common Factor of 630, 975, 21 by common division method
• Greatest Common Factor of 630, 975, 21 with matching the biggest common factor

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∴ So the GCF of the given numbers is 3 = 3

Factors of 630

List of positive integer factors of 630 that divides 630 without a remainder.

1,2,3,5,6,7,9,10,14,15,18,21,30,35,42,45,63,70,90,105,126,210,315,630

Factors of 975

List of positive integer factors of 975 that divides 975 without a remainder.

1,3,5,13,15,25,39,65,75,195,325,975

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 630,975,21 . The biggest common factor number is the GCF number.
So the greatest common factor 630,975,21 is 3.

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

• GCF of 477, 728, 71
• GCF of 936, 699, 86
• GCF of 641, 739, 24
• GCF of 602, 687, 65
• GCF of 822, 194, 63

1. What is the GCF of 630, 975, 21?

Answer: GCF of 630, 975, 21 is 3.

2. How to Find the GCF of 630, 975, 21

Answer: Greatest Common Factor(GCF) of 630, 975, 21 = 3

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

Step 2: Then multiply all the prime factors GCF(630, 975, 21) = 3.