**In how many ways can a number be written as a product of two different factors?**

**Best Explanation:**

Let Number=x

Let Its
prime factors are:

2^a*3^b*5^c…………….and
so on

Number of
factors

=(a+1)(b+1)(c+1)…………
and so on

Required number of ways

=[(a+1)(b+1)(c+1)………… and so on]/2

If required number of ways result to a.b then required number of ways=a+1

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