GCF of 1 and 27 (Greatest Common Factor)

"Greatest Common Factor" Calculator
Greatest Common Factor of
and

What is the Greatest Common Divisor of 1 and 27?

Answer

GCF of 1 and 27 is
1

(One)

Finding GCF for 1 and 27 using all factors (divisors) listing

The first method to find GCF for numbers 1 and 27 is to list all factors for both numbers and pick the highest common one:

All factors of 1: 1

All factors of 27: 1, 3, 9, 27

So the Greatest Common Factor for 1 and 27 is 1

Finding GCF for 1 and 27 by Prime Factorization

The numbers 1 and 27 have no common prime factors, which means they are coprime (relatively prime). Therefore, GCF = 1.

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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 1 and 27? (The answer is: 1). Select the first number (e.g. '1') and the second number (e.g. '27'). 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
111
141
151
161
171
181
191
1101
1121
1131
1161
1201
1271
1561
11001

FAQ

What is the Greatest Common Divisor of 1 and 27?

GCF of 1 and 27 is 1

How to find the GCF of 1 and 27?

You can find the GCF of 1 and 27 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 1 and 27 is 1.

What prime factors do 1 and 27 share?

1 and 27 have no prime factor in common, so the only integer that divides both of them is 1 and their GCF is 1.

How does the GCF reduce the fraction 1/27?

Divide the numerator and the denominator by the GCF 1: 1 ÷ 1 = 1 and 27 ÷ 1 = 27. So 1/27 in lowest terms is 1/27.

Are 1 and 27 coprime?

Yes, 1 and 27 are coprime (relatively prime) because their Greatest Common Factor is 1.

See Also