GCF for 21 and 60

"Greatest Common Factor" Calculator

Greatest Common Factor of

and

What is the Greatest common Divisor of 21 and 60?

Answer: GCF of 21 and 60 is 3

(Three)

Finding GCF for 21 and 60 using all factors (divisors) listing

The first method to find GCF for numbers 21 and 60 is to list all factors for both numbers and pick the highest common one:

All factors of 21: 1, 3, 7, 21

All factors of 60: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60

So the Greatest Common Factor for 21 and 60 is 3

Finding GCF for 21 and 60 by Prime Factorization

The second method to find GCF for numbers 21 and 60 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 21: 3, 7

All Prime Factors of 60: 2, 2, 3, 5

As we can see there is only one Prime Factor common to both numbers. It is 3

So 3 is the Greatest Common Factor of 21 and 60

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About "Greatest Common Factor" Calculator

This calculator will help you find the greatest common factor (GCF) of two numbers. For example, it can help you find out what is the Greatest common Divisor of 21 and 60? (The answer is: 3). Select the first number (e.g. '21') and the second number (e.g. '60'). After that hit the 'Calculate' button.
Greatest Common Factor (GCF) also known as the Greatest Common Divisor (GCD) or Highest Common Factor (HCF) - it is the largest positive integer that divides each of the integers with zero remainder

"Greatest Common Factor" Calculator

Greatest Common Factor of

and

GCF Table

Number 1Number 2GCF
6606
7601
8604
9603
106010
11601
126012
13601
14602
156015
16604
17601
18606
19601
206020
21603
22602
23601
246012
25605
26602
27603
28604
29601
306030
31601
32604
33603
34602
35605

FAQ

What is the Greatest common Divisor of 21 and 60?

GCF of 21 and 60 is 3

See Also