GCF of 42 and 55 (Greatest Common Factor)

"Greatest Common Factor" Calculator

Greatest Common Factor of

and

What is the Greatest Common Divisor of 42 and 55?

Answer

GCF of 42 and 55 is 1

(One)

Finding GCF for 42 and 55 using all factors (divisors) listing

The first method to find GCF for numbers 42 and 55 is to list all factors for both numbers and pick the highest common one:

All factors of 42: 1, 2, 3, 6, 7, 14, 21, 42

All factors of 55: 1, 5, 11, 55

So the Greatest Common Factor for 42 and 55 is 1

Finding GCF for 42 and 55 by Prime Factorization

The numbers 42 and 55 have no common prime factors, which means they are coprime (relatively prime). Therefore, GCF = 1.

Related Calculations

See Also

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 42 and 55? (The answer is: 1). Select the first number (e.g. '42') and the second number (e.g. '55'). 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
422814
42442
42453
42462
42486
42497
42502
42513
42522
42546
42551
425614
42573
42582
42591
42606
426321
427014
42966
4210521
42136521

FAQ

What is the Greatest Common Divisor of 42 and 55?

GCF of 42 and 55 is 1

How to find the GCF of 42 and 55?

You can find the GCF of 42 and 55 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 42 and 55 is 1.

Are 42 and 55 coprime?

Yes, 42 and 55 are coprime (relatively prime) because their Greatest Common Factor is 1.

See Also