GCF for 15 and 17

What is the Greatest common Divisor of 15 and 17?

Answer: GCF of 15 and 17 is 1

(One)

Finding GCF for 15 and 17 using all factors (divisors) listing

The first method to find GCF for numbers 15 and 17 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 17: 1, 17

So the Greatest Common Factor for 15 and 17 is 1

Finding GCF for 15 and 17 by Prime Factorization

See Also

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 17? (The answer is: 1). Select the first number (e.g. '15') and the second number (e.g. '17'). 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

GCF Table

Number 1Number 2GCF
1171
2171
317
4171
5171
6171
717
8171
917
10171
1117
12171
1317
14171
1517
16171
171717
18171
19171
20171
21171
22171
23171
24171
25171
26171
27171
28171
29171
30171

FAQ

What is the Greatest common Divisor of 15 and 17?

GCF of 15 and 17 is 1