[Maths Class Notes] on Factors of 70 Pdf for Exam

Factors of a number are a pair of numbers which when multiplied together produce that number. For example, the factors of 70 are 10 and 7 because when we multiply 10 with 7 we get the product as 70. So, 10 and 7 are factors of 70. Similarly, there are other numbers than which when multiplied together give the result as 70. Those numbers are also called factors of 70. The two numbers which are multiplied together are known as a pair. We can call 10, 7 as a factor pair of 70.  

Let us find other factor pairs of 70 and carry out prime factorization of 70. Factors of 70 are written as (10, 7) and (-10, -7). You know that when we multiply two negative numbers, the product is a positive number. When we multiply -10 x -7, we get the product as 70. It means that we can consider both positive and negative factor pairs for number 70. It is essential to remember that the factor pairs of 70 can only be whole numbers or integers. Whole numbers can be positive or negative. Decimals and fractions are not considered as factors of a number.  

Prime Factorization of 70 

In mathematics, the prime factorization of positive integers are the prime numbers that divide that number exactly, without a remainder. The prime factorization of a positive number is the series of the integer’s prime factors with their multiples. The process that determines these factors is known as prime factorization. Prime factors of a number are those prime numbers that when multiplied together give the original number. Below find an illustrated example of prime factorization of the number 70.

As you can see, 70 when divided by 2, 5 or 7 gives no remainder. These three numbers are integers and prime numbers. They are also called composite numbers. Prime factorization of a number is the determination of a set of prime integers which when multiplied together give the original number or integer. It is clear that prime numbers are numbers that can divide a number without a remainder. We can call this type of division as the perfect division. 

So, it means that 70 is divisible by 2, 5, and 7. They are proper or prime divisors of 70.

What Are The Factors of 70? 

When we want to find out the factors of 70, in other words, we are finding out other numbers that when multiplied together give the product as 70.  To find the factors of 70, we have to follow some steps. 

Let us write the number 70 first. Now, we have to find two number that give the result as 70, as a result of multiplication. Let us start by writing,  

1 x 70 = 70 

2 x 35 = 70 

5 x 14 = 70 

10 x 7 = 70  

Let us consider the numbers 2 and 35.

As you know that 2 is a prime number- it has only two factors 1 and 2. It is not possible to factorize these numbers further, as 2 x 1 =2

Take the number 35. It is a composite number – it can be factorized further, as 5 x 7 x 1

Hence, the factorization of 70 is written as, 

 70 = 7 x 5 x 2 x 1. 

Let us consider the numbers 5 and 14.

As you know that 5 is a prime number- it has only two factors 1 and 5. It is not possible to factorize these numbers further, as 5 x 1 =5

Take the number 14. It is a composite number – it can be factorized further, as 2 x 7 x 1

Hence, the factorization of 70 is written as, 

 70 = 7 x 5 x 2 x 1. 

No matter which factors of 70 you take, the final answer will always come down to, 

 70 = 7 x 5 x2 x 1. 

When asked to find out the total number of factors of 70, you have to write down all the multiples of 70 such as, 

Factors of 70 are: 1, 2, 5,7,14, 10, 35 and 70 = 8 factors. 

Prime Factors of 70 are 1, 2, 5, 7, 10, 14, 35, 70, and its Pair Factors are (1, 70), (2, 35), (5, 14), and (7, 10). To recapitulate what we learned above, let us go through the points below.

• Factors of 70: 1, 2, 5, 7, 10, 14, 35 and 70

• -1, -2, -5, -7, -10, -14, -35, and -70 are negative factors of 70.

• Prime Factors of 70: 2, 5, 7

• Sum of Factors of 70: 144

The factors of a number are any numbers that can be multiplied to produce that number. A number can also be factored by dividing it repeatedly. While factoring in bigger numbers can be challenging at first, there are a few easy strategies you can learn to discover the factors quickly.