GCF for 30 and 915

What is the Greatest Common Factor of 30 and 915?

Answer: GCF of 30 and 915 is 15

(Fifteen)

Finding GCF for 30 and 915 using all factors (divisors) listing

The first method to find GCF for numbers 30 and 915 is to list all factors for both numbers and pick the highest common one:

All factors of 30: 1, 2, 3, 5, 6, 10, 15, 30

All factors of 915: 1, 3, 5, 15, 61, 183, 305, 915

So the Greatest Common Factor for 30 and 915 is 15

Finding GCF for 30 and 915 by Prime Factorization

The second method to find GCF for numbers 30 and 915 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 30: 2, 3, 5

All Prime Factors of 915: 3, 5, 61

As we can see there are Prime Factors common to both numbers: 3, 5

Now we need to multiply them to find GCF: 3 × 5 = 15

GCF Table

Number 1Number 2GCF
1591515
169151
179151
189153
199151
209155
219153
229151
239151
249153
259155
269151
279153
289151
299151
3091515
319151
329151
339153
349151
359155
369153
379151
389151
399153
409155
419151
429153
439151
449151

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 Factor of 30 and 915? (The answer is: 15). Select the first number (e.g. '30') and the second number (e.g. '915'). 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

FAQ

What is the Greatest Common Factor of 30 and 915?

GCF of 30 and 915 is 15