GCF for 15 and 25

"Greatest Common Factor" Calculator

Greatest Common Factor of

and

What is the Greatest common Divisor of 15 and 25?

Answer: GCF of 15 and 25 is 5

(Five)

Finding GCF for 15 and 25 using all factors (divisors) listing

The first method to find GCF for numbers 15 and 25 is to list all factors for both numbers and pick the highest common one:

All factors of 15: 1, 3, 5, 15

All factors of 25: 1, 5, 25

So the Greatest Common Factor for 15 and 25 is 5

Finding GCF for 15 and 25 by Prime Factorization

The second method to find GCF for numbers 15 and 25 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 15: 3, 5

All Prime Factors of 25: 5, 5

As we can see there is only one Prime Factor common to both numbers. It is 5

So 5 is the Greatest Common Factor of 15 and 25

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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 15 and 25? (The answer is: 5). Select the first number (e.g. '15') and the second number (e.g. '25'). 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
1251
2251
3251
4251
5255
6251
7251
8251
9251
10255
11251
12251
13251
14251
15255
16251
17251
18251
19251
20255
21251
22251
23251
24251
252525
26251
27251
28251
29251
30255

FAQ

What is the Greatest common Divisor of 15 and 25?

GCF of 15 and 25 is 5

See Also