GCF for 20 and 610

What is the Greatest Common Factor of 20 and 610?

Answer: GCF of 20 and 610 is 10

(Ten)

Finding GCF for 20 and 610 using all factors (divisors) listing

The first method to find GCF for numbers 20 and 610 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 610: 1, 2, 5, 10, 61, 122, 305, 610

So the Greatest Common Factor for 20 and 610 is 10

Finding GCF for 20 and 610 by Prime Factorization

The second method to find GCF for numbers 20 and 610 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 610: 2, 5, 61

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

Now we need to multiply them to find GCF: 2 × 5 = 10

GCF Table

Number 1Number 2GCF
56105
66102
76101
86102
96101
1061010
116101
126102
136101
146102
156105
166102
176101
186102
196101
2061010
216101
226102
236101
246102
256105
266102
276101
286102
296101
3061010
316101
326102
336101
346102

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 610? (The answer is: 10). Select the first number (e.g. '20') and the second number (e.g. '610'). 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 610?

GCF of 20 and 610 is 10