GCF for 90 and 890

What is the Greatest Common Factor of 90 and 890?

Answer: GCF of 90 and 890 is 10

(Ten)

Finding GCF for 90 and 890 using all factors (divisors) listing

The first method to find GCF for numbers 90 and 890 is to list all factors for both numbers and pick the highest common one:

All factors of 90: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90

All factors of 890: 1, 2, 5, 10, 89, 178, 445, 890

So the Greatest Common Factor for 90 and 890 is 10

Finding GCF for 90 and 890 by Prime Factorization

The second method to find GCF for numbers 90 and 890 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 90: 2, 3, 3, 5

All Prime Factors of 890: 2, 5, 89

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
758905
768902
778901
788902
798901
8089010
818901
828902
838901
848902
858905
868902
878901
888902
8989089
9089010
918901
928902
938901
948902
958905
968902
978901
988902
998901
10089010
1018901
1028902
1038901
1048902

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 90 and 890? (The answer is: 10). Select the first number (e.g. '90') and the second number (e.g. '890'). 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 90 and 890?

GCF of 90 and 890 is 10