Greatest Common Factor of 1661 and 1665

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

Make use of GCF Calculator to quickly find the Greatest Common Factor of numbers 1661, 1665 i.e. 1 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 1661 and 1665 is 1.

GCF(1661,1665) = 1

GCF of 1661 and 1665

Greatest common factor or Greatest common divisor (GCD) can be calculated in following way;

GCF of:
and

Greatest Common Factor of 1661 and 1665

GCF of 1661 and 1665 is 1

Prime Factorization of 1661


11 1661
151 151
1

Prime factors of 1661 are 11,151. Prime factorization of 1661 in exponential form is:

1661 = 111×1511

Prime Factorization of 1665


3 1665
3 555
5 185
37 37
1

Prime factors of 1665 are 3,5,37. Prime factorization of 1665 in exponential form is:

1665 = 32×51×371

∴ So by taking common prime factors GCF of 1661 and 1665 is 1

Greatest Common Factor of 1661 and 1665 by matching factors method

Factors of 1661

List of positive integer factors of 1661 that divides 1661 without a remainder.

1,11,151,1661

Factors of 1665

List of positive integer factors of 1665 that divides 1665 without a remainder.

1,3,5,9,15,37,45,111,185,333,555,1665

Greatest Common Factor

We found the factors and prime factorization of 1661 and 1665. The biggest common factor number is the GCF number.
So the greatest common factor 1661 and 1665 is 1.

Also check out the Least Common Multiple of 1661 and 1665

Properties of GCF 1661 and 1665

(i) The GCF of 1661 and 1665 is associative

GCF of 1661 and 1665 = GCF of 1665 and 1661

Related Greatest Common Factor of 1661

Related Greatest Common Factor of 1665

Frequently Asked Questions on GCF of 1661 and 1665

1. What is the GCF of 1661 and 1665?

Answer: GCF of 1661 and 1665 is 1.

2. What are the Factors of 1661?

Answer: Factors of 1661 are 1, 11, 151, 1661. There are 4 integers that are factors of 1661. The greatest factor of 1661 is 1661.

3. What are the Factors of 1665?

Answer: Factors of 1665 are 1, 3, 5, 9, 15, 37, 45, 111, 185, 333, 555, 1665. There are 12 integers that are factors of 1665. The greatest factor of 1665 is 1665.

4. How to Find the GCF of 1661 and 1665?

Answer:

Greatest Common Factor of 1661 and 1665 = 1

Step 1: Find the prime factorization of 1661

1661 = 11 x 151

Step 2: Find the prime factorization of 1665

1665 = 3 x 3 x 5 x 37

Step 3: Multiply those factors both numbers have in common in steps i) or ii) above to find the gcf:

GCF = = 1

Step 4: Therefore, the greatest common factor of 1661 and 1665 is 1