Greatest Common Factor of 15, 21, 53, 693

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

• Greatest Common Factor of 15, 21, 53, 693 by common division method
• Greatest Common Factor of 15, 21, 53, 693 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 15

List of positive integer factors of 15 that divides 15 without a remainder.

1,3,5,15

Factors of 21

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

1,3,7,21

Factors of 53

List of positive integer factors of 53 that divides 53 without a remainder.

1,53

Factors of 693

List of positive integer factors of 693 that divides 693 without a remainder.

1,3,7,9,11,21,33,63,77,99,231,693

Greatest Common Factor

We found the factors 15,21,53,693 . The biggest common factor number is the GCF number.
So the greatest common factor 15,21,53,693 is 1.

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

• GCF of 42, 91, 35, 937
• GCF of 72, 84, 26, 954
• GCF of 21, 97, 21, 914
• GCF of 79, 12, 12, 409
• GCF of 90, 78, 13, 839

1. What is the GCF of 15, 21, 53, 693?

Answer: GCF of 15, 21, 53, 693 is 1.

2. How to Find the GCF of 15, 21, 53, 693

Answer: Greatest Common Factor(GCF) of 15, 21, 53, 693 = 1

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

Step 2: Then multiply all the prime factors GCF(15, 21, 53, 693) = 1.