GCF for 40 and 865

What is the Greatest Common Factor of 40 and 865?

Answer: GCF of 40 and 865 is 5

(Five)

Finding GCF for 40 and 865 using all factors (divisors) listing

The first method to find GCF for numbers 40 and 865 is to list all factors for both numbers and pick the highest common one:

All factors of 40: 1, 2, 4, 5, 8, 10, 20, 40

All factors of 865: 1, 5, 173, 865

So the Greatest Common Factor for 40 and 865 is 5

Finding GCF for 40 and 865 by Prime Factorization

The second method to find GCF for numbers 40 and 865 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 40: 2, 2, 2, 5

All Prime Factors of 865: 5, 173

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 40 and 865

GCF Table

Number 1Number 2GCF
258655
268651
278651
288651
298651
308655
318651
328651
338651
348651
358655
368651
378651
388651
398651
408655
418651
428651
438651
448651
458655
468651
478651
488651
498651
508655
518651
528651
538651
548651

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 40 and 865? (The answer is: 5). Select the first number (e.g. '40') and the second number (e.g. '865'). 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 40 and 865?

GCF of 40 and 865 is 5