GCF for 39 and 40

What is the Greatest common Divisor of 39 and 40?

Answer: GCF of 39 and 40 is 1

(One)

Finding GCF for 39 and 40 using all factors (divisors) listing

The first method to find GCF for numbers 39 and 40 is to list all factors for both numbers and pick the highest common one:

All factors of 39: 1, 3, 13, 39

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

So the Greatest Common Factor for 39 and 40 is 1

Finding GCF for 39 and 40 by Prime Factorization

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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 39 and 40? (The answer is: 1). Select the first number (e.g. '39') and the second number (e.g. '40'). 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
2440
2540
26402
27401
2840
29401
3040
31401
3240
33401
34402
3540
3640
37401
38402
3940
404040
41401
42402
43401
44404
45405
46402
47401
48408
49401
504010
51401
52404
53401

FAQ

What is the Greatest common Divisor of 39 and 40?

GCF of 39 and 40 is 1