GCF for 80 and 100

"Greatest Common Factor" Calculator

Greatest Common Factor of

and

What is the Greatest Common Divisor of 80 and 100?

Answer

GCF of 80 and 100 is 20

(Twenty)

Finding GCF for 80 and 100 using all factors (divisors) listing

The first method to find GCF for numbers 80 and 100 is to list all factors for both numbers and pick the highest common one:

All factors of 80: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80

All factors of 100: 1, 2, 4, 5, 10, 20, 25, 50, 100

So the Greatest Common Factor for 80 and 100 is 20

Finding GCF for 80 and 100 by Prime Factorization

The second method to find GCF for numbers 80 and 100 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 80: 2, 2, 2, 2, 5

All Prime Factors of 100: 2, 2, 5, 5

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

Now we need to multiply them to find GCF: 2 × 2 × 5 = 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 80 and 100? (The answer is: 20). Select the first number (e.g. '80') and the second number (e.g. '100'). 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 1 Number 2 GCF
65 100 5
66 100 2
67 100 1
68 100 4
69 100 1
70 100 10
71 100 1
72 100 4
73 100 1
74 100 2
75 100 25
76 100 4
77 100 1
78 100 2
79 100 1
80 100 20
81 100 1
82 100 2
83 100 1
84 100 4
85 100 5
86 100 2
87 100 1
88 100 4
89 100 1
90 100 10
91 100 1
92 100 4
93 100 1
94 100 2

FAQ

What is the Greatest Common Divisor of 80 and 100?
GCF of 80 and 100 is 20

How to find the GCF of 80 and 100?
You can find the GCF of 80 and 100 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 80 and 100 is 20.

See Also