GCF for 81 and 100

What is the Greatest common Divisor of 81 and 100?

Answer: GCF of 81 and 100 is 1

(One)

Finding GCF for 81 and 100 using all factors (divisors) listing

The first method to find GCF for numbers 81 and 100 is to list all factors for both numbers and pick the highest common one:

All factors of 81: 1, 3, 9, 27, 81

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

So the Greatest Common Factor for 81 and 100 is 1

Finding GCF for 81 and 100 by Prime Factorization

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 81 and 100? (The answer is: 1). Select the first number (e.g. '81') 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

GCF Table

Number 1Number 2GCF
661002
671001
681004
691001
70100
711001
72100
731001
741002
75100
761004
771001
781002
791001
80100
81100
821002
831001
84100
85100
861002
871001
88100
891001
9010010
911001
921004
931001
941002
95100

FAQ

What is the Greatest common Divisor of 81 and 100?

GCF of 81 and 100 is 1