n=p^a * q^b * r^c.....
where p,q,r= unique prime numbers from prime factors
no of prime factors(nf) = (a+1)(b+1)(c+1)...
i.e find prime factors in power form and product of power increased by 1
in numbre theory nf is called tau function
let d( ) = no of factors function
len x = prime number
d(n)=2 i.e n and 1 are factors
d(x^n)=n+1 i.e its divisible by x^0,x^1,x^2 ... x^n so n+1 unique factors
n=p^a * q^b * r^c .....