GCF for 20 and 160

What is the Greatest Common Factor of 20 and 160?

Answer: GCF of 20 and 160 is 20

(Twenty)

Finding GCF for 20 and 160 using all factors (divisors) listing

The first method to find GCF for numbers 20 and 160 is to list all factors for both numbers and pick the highest common one:

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

All factors of 160: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160

So the Greatest Common Factor for 20 and 160 is 20

Finding GCF for 20 and 160 by Prime Factorization

The second method to find GCF for numbers 20 and 160 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 20: 2, 2, 5

All Prime Factors of 160: 2, 2, 2, 2, 2, 5

As we can see there are Prime Factors common to both numbers: 2, 2, 5

Now we need to multiply them to find GCF: 2 × 2 × 5 = 20

GCF Table

Number 1Number 2GCF
51605
61602
71601
81608
91601
1016010
111601
121604
131601
141602
151605
1616016
171601
181602
191601
2016020
211601
221602
231601
241608
251605
261602
271601
281604
291601
3016010
311601
3216032
331601
341602

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 20 and 160? (The answer is: 20). Select the first number (e.g. '20') and the second number (e.g. '160'). 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 20 and 160?

GCF of 20 and 160 is 20