GCF of 2 and 20 (Greatest Common Factor)

"Greatest Common Factor" Calculator

Greatest Common Factor of

and

What is the Greatest Common Divisor of 2 and 20?

Answer

GCF of 2 and 20 is 2

(Two)

Finding GCF for 2 and 20 using all factors (divisors) listing

The first method to find GCF for numbers 2 and 20 is to list all factors for both numbers and pick the highest common one:

All factors of 2: 1, 2

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

So the Greatest Common Factor for 2 and 20 is 2

Finding GCF for 2 and 20 by Prime Factorization

The second method to find GCF for numbers 2 and 20 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 2: 2

All Prime Factors of 20: 2, 2, 5

As we can see there is only one Prime Factor common to both numbers. It is 2

So 2 is the Greatest Common Factor of 2 and 20

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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 2 and 20? (The answer is: 2). Select the first number (e.g. '2') and the second number (e.g. '20'). 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.

"Greatest Common Factor" Calculator

Greatest Common Factor of

and

GCF Table

Number 1Number 2GCF
242
251
262
271
282
291
2102
2111
2122
2131
2142
2151
2162
2171
2182
2202
2211
2222
2242
2251
2262
2271
2282
2302
2311
2342
2362
2382
2411
2431

FAQ

What is the Greatest Common Divisor of 2 and 20?

GCF of 2 and 20 is 2

How to find the GCF of 2 and 20?

You can find the GCF of 2 and 20 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 2 and 20 is 2.

See Also