What is the GCF of 16 and 40

"Greatest Common Factor" Calculator

What is the Greatest Common Divisor of 16 and 40?

Answer

GCF of 16 and 40 is 8

(Eight)

Finding GCF for 16 and 40 using all factors (divisors) listing

The first method to find GCF for numbers 16 and 40 is to list all factors for both numbers and pick the highest common one:

All factors of 16: 1, 2, 4, 8, 16

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

So the Greatest Common Factor for 16 and 40 is 8

Finding GCF for 16 and 40 by Prime Factorization

The second method to find GCF for numbers 16 and 40 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 16: 2, 2, 2, 2

All Prime Factors of 40: 2, 2, 2, 5

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

Now we need to multiply them to find GCF: 2 × 2 × 2 = 8

Related Calculations

GCF Table

Number 1	Number 2	GCF
16	21	1
16	22	2
16	23	1
16	24	8
16	25	1
16	26	2
16	27	1
16	28	4
16	30	2
16	32	16
16	33	1
16	34	2
16	35	1
16	36	4
16	38	2
16	39	1
16	40	8
16	42	2
16	43	1
16	44	4
16	45	1
16	46	2
16	48	16
16	49	1
16	50	2
16	53	1
16	55	1
16	56	8
16	58	2
16	60	4

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 16 and 40? (The answer is: 8). Select the first number (e.g. '16') 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 of 16 and 40 (Greatest Common Factor)

What is the Greatest Common Divisor of 16 and 40?

Finding GCF for 16 and 40 using all factors (divisors) listing

Finding GCF for 16 and 40 by Prime Factorization

Related Calculations

See Also

GCF Table

About "Greatest Common Factor" Calculator

"Greatest Common Factor" Calculator

FAQ

What is the Greatest Common Divisor of 16 and 40?

How to find the GCF of 16 and 40?

See Also

Number 1	Number 2	GCF
16	21	1
16	22	2
16	23	1
16	24	8
16	25	1
16	26	2
16	27	1
16	28	4
16	30	2
16	32	16
16	33	1
16	34	2
16	35	1
16	36	4
16	38	2
16	39	1
16	40	8
16	42	2
16	43	1
16	44	4
16	45	1
16	46	2
16	48	16
16	49	1
16	50	2
16	53	1
16	55	1
16	56	8
16	58	2
16	60	4

Number 1	Number 2	GCF
16	21	1
16	22	2
16	23	1
16	24	8
16	25	1
16	26	2
16	27	1
16	28	4
16	30	2
16	32	16
16	33	1
16	34	2
16	35	1
16	36	4
16	38	2
16	39	1
16	40	8
16	42	2
16	43	1
16	44	4
16	45	1
16	46	2
16	48	16
16	49	1
16	50	2
16	53	1
16	55	1
16	56	8
16	58	2
16	60	4

Number 1	Number 2	GCF
16	21	1
16	22	2
16	23	1
16	24	8
16	25	1
16	26	2
16	27	1
16	28	4
16	30	2
16	32	16
16	33	1
16	34	2
16	35	1
16	36	4
16	38	2
16	39	1
16	40	8
16	42	2
16	43	1
16	44	4
16	45	1
16	46	2
16	48	16
16	49	1
16	50	2
16	53	1
16	55	1
16	56	8
16	58	2
16	60	4