# Factors of 221 in pair

Factors of 221 in pair are (1, 221) , (13, 17)

#### How to find factors of a number in pair

 1.   Steps to find factors of 221 in pair 2.   What is factors of a number in pair? 3.   What are Factors? 4.   Frequently Asked Questions 5.   Examples of factors in pair

### Example: Find factors of 221 in pair

Factor Pair Pair Factorization
1 and 221 1 x 221 = 221
13 and 17 13 x 17 = 221

Since the product of two negative numbers gives a positive number, the product of the negative values of both the numbers in a pair factor will also give 221. They are called negative pair factors.

Hence, the negative pairs of 221 would be ( -1 , -221 ) .

#### Introduction to factor pairs

Factor pair in mathematics is defined as all factors of a given number which when written in pair and multiplied gives the original number. Every natural number is a product of atleast one factor pair. Eg- Factors of 221 are 1 , 13 , 17 , 221. So, factors of 221 in pair are (1,221), (13,17).

#### How can we define factors?

In mathematics a factor is a number which divides into another without leaving any remainder. Or we can say, any two numbers that multiply to give a product are both factors of that product. It can be both positive or negative.

#### Properties of Factors

• Every factor of a number is an exact divisor of that number, example 1, 13, 17, 221 are exact divisors of 221.
• Every number other than 1 has at least two factors, namely the number itself and 1.
• Each number is a factor of itself. Eg. 221 is a factor of itself.
• 1 is a factor of every number. Eg. 1 is a factor of 221.

#### Steps to find Factors of 221

• Step 1. Find all the numbers that would divide 221 without leaving any remainder. Starting with the number 1 upto 110 (half of 221). The number 1 and the number itself are always factors of the given number.
221 ÷ 1 : Remainder = 0
221 ÷ 13 : Remainder = 0
221 ÷ 17 : Remainder = 0
221 ÷ 221 : Remainder = 0

Hence, Factors of 221 are 1, 13, 17, and 221

• Is 221 a perfect square?

No 221 is not a perfect square.

• Write five multiples of 221.

Five multiples of 221 are 442, 663, 884, 1105, 1326.

• Is there any even prime factor of 221?

No there is no even prime factor, i.e. 2, of 221.

• What do you mean by proper divisors?

A number x is said to be the proper divisor of y if it divides y completely, given that x is smaller than y.

• What do you mean by improper divisors?

An improper divisor of a number is the number itself apart from this any divisor of a given number is a proper divisor.

#### Examples of Factors

Can you help Rubel in arranging 221 blocks in order to form a rectangle in all possible ways? For arranging 221 blocks in order to form a rectangle in all possible ways we need to find factors of 221 in pair.

Factors of 221 are 1, 13, 17, 221. So, factors of 221 in pair are (1,221), (13,17).

Ariel has been asked to write all factor pairs of 221 but she is finding it difficult. Can you help her find out?

Factors of 221 are 1, 13, 17, 221. So, factors of 221 in pair are (1,221), (13,17).

What are the pair factors of 221?

Factors of 221 are 1, 13, 17, 221. Hence, the factors of 221 in pair are (1,221), (13,17).

Can you help Sammy list the factors of 221 and also find the factor pairs?

Factors of 221 are 1, 13, 17, 221.
Factors of 221 in pair are (1,221), (13,17).

Help Diji in finding factors of 221 by Prime Factorization method and then sorting factors of 221 in pairs.

Prime factorization of 221 is 13 x 17. Factors of 221 in pair can be written as (1,221), (13,17).

Write the smallest prime factor of 221.

Smallest prime factor of 221 is 13.

Write the largest prime factor of 221.

Largest prime factor of 221 is 17.

Diji wants to write all the negative factors of 221. Can you help Diji in doing the same?

Negative factors of 221 are -1, -13, -17, -221.