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Q.

Find the sum of all the factors of 78.


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a

168

b

170

c

167

d

189 

answer is A.

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Detailed Solution

Concept:
Let's first examine what a factor is.
In mathematics, an integer m that can be multiplied by another integer to create n is known as a divisor of an integer n, also known as a factor of n.A number n is divisible by another number m if and only if m is a divisor of n; this indicates that there is no remainder when dividing n by m.
Now let's calculate the factors of 78.
We shall prime factorise 78 so we get
Therefore, 2 ,3 ,13 is the prime factorization of 78.
Now, these prime factors are multiplied singly and then collectively to create the components of 78.
When we do it, we obtain:
The numbers 1, 2, 3, 6, 13, 26, 39, and 78 make up the number 78.
The required total is 1 + 2 + 3 + 6 + 13 + 26 + 39 + 78, which equals 168.
Hence, the correct option is 1.
 
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