# What are all the factors, the prime factorization, and factor pairs of 1155?

To find the factors of 1155, divide 1155 by each number starting with 1 and working up to 1155

## What is a factor in math ?

Factors are the numbers you multiply together to get another number. For example, the factors of 15 are 3 and 5 because 3 × 5 = 15.

The factors of a number can be positive or negative, but they cannot be zero.

The factors of a number can be used to find out if the number is prime or not.

A prime number is a number that has only two factors: itself and 1. For example, the number 7 is prime because its only factors are 7 and 1.

## List all of the factors of 1155 ?

To calculate the factors of 1155 , you can use the division method.

1. Begin by dividing 1155 by the smallest possible number, which is 2.

2. If the division is even, then 2 is a factor of 1155.

3. Continue dividing 1155 by larger numbers until you find an odd number that does not divide evenly into 1155 .

4. The numbers that divide evenly into 1155 are the factors of 1155 .

Now let us find how to calculate all the factors of One thousand one hundred fifty-five :

1155 ÷ 1 = 1155
1155 ÷ 3 = 385
1155 ÷ 5 = 231
1155 ÷ 7 = 165
1155 ÷ 11 = 105
1155 ÷ 15 = 77
1155 ÷ 21 = 55
1155 ÷ 33 = 35
1155 ÷ 35 = 33
1155 ÷ 55 = 21
1155 ÷ 77 = 15
1155 ÷ 105 = 11
1155 ÷ 165 = 7
1155 ÷ 231 = 5
1155 ÷ 385 = 3
1155 ÷ 1155 = 1

As you can see, the factors of 1155 are 1 , 3 , 5 , 7 , 11 , 15 , 21 , 33 , 35 , 55 , 77 , 105 , 165 , 231 , 385 and 1155 .

## How many factors of 1155 are there ?

The factors of 1155 are the numbers that can evenly divide 1155 . These numbers are 1 , 3 , 5 , 7 , 11 , 15 , 21 , 33 , 35 , 55 , 77 , 105 , 165 , 231 , 385 and 1155.

Thus, there are a total of 16 factors of 1155

## What are the factor pairs of 1155 ?

Factor Pairs of 1155 are combinations of two factors that when multiplied together equal 1155. There are many ways to calculate the factor pairs of 1155 .

One easy way is to list out the factors of 1155 :
1 , 3 , 5 , 7 , 11 , 15 , 21 , 33 , 35 , 55 , 77 , 105 , 165 , 231 , 385 , 1155

Then, pair up the factors:
(1,1155),(3,385),(5,231),(7,165),(11,105),(15,77),(21,55) and (33,35) These are the factor pairs of 1155 .

## Prime Factorisation of 1155

There are a few different methods that can be used to calculate the prime factorization of a number. Two of the most common methods are listed below.

1) Use a factor tree :

1. Take the number you want to find the prime factorization of and write it at the top of the page

2. Find the smallest number that goes into the number you are finding the prime factorization of evenly and write it next to the number you are finding the prime factorization of

3. Draw a line under the number you just wrote and the number you are finding the prime factorization of

4. Repeat step 2 with the number you just wrote until that number can no longer be divided evenly

5. The numbers written on the lines will be the prime factors of the number you started with

For example, to calculate the prime factorization of 1155 using a factor tree, we would start by writing 1155 on a piece of paper. Then, we would draw a line under it and begin finding factors.

The final prime factorization of 1155 would be 3 x 5 x 7 x 11.

2) Use a factorization method :

There are a few different factorization methods that can be used to calculate the prime factorization of a number.

One common method is to start by dividing the number by the smallest prime number that will divide evenly into it.

Then, continue dividing the number by successively larger prime numbers until the number has been fully factorised.

For example, to calculate the prime factorization of 1155 using this method, we keep dividing until it gives a non-zero remainder.

1155 ÷ 3 = 385
385 ÷ 5 = 77
77 ÷ 7 = 11
11 ÷ 11 = 1

So the prime factors of 1155 are 3 x 5 x 7 x 11.

## Frequently Asked Questions on Factors

### What are all the factors of 1155 ?

The factors of 1155 are 1 , 3 , 5 , 7 , 11 , 15 , 21 , 33 , 35 , 55 , 77 , 105 , 165 , 231 , 385 and 1155.

### What is the prime factorization of 1155 ?

The prime factorization of 1155 is 3 x 5 x 7 x 11 or 31 x 51 x 71 x 111, where 3 , 5 , 7 , 11 are the prime numbers .

### What are the prime factors of 1155 ?

The prime factors of 1155 are 3 , 5 , 7 , 11 .

### Is 1155 a prime number ?

A prime number is a number that has only two factors 1 and itself.
1155 it is not a prime number because it has the factors 1 , 3 , 5 , 7 , 11 , 15 , 21 , 33 , 35 , 55 , 77 , 105 , 165 , 231 , 385 and 1155.