Let `d_1, d_2, d_3,.......d_k`. be all the divisors of a 999s positive integer n including 1 and n. Suppose `d_1 + d_2+d_3+.......d_k=72` , then the value of `1/a_1+1/d_2+1/d_3+......+1/d_k` is

Let d_(1),d_(2),d_(3),......,d_(k) be all the divisors of a positive integer n including 1 and n. Suppose d_(1)+d_(2)+d_(3)+......+d_(k)=72, then the value of (1)/(d_(1))+(1)/(d_(2))+(1)/(d_(3))+......+(1)/(d_(k)) is

For a positive integer n, define d(n) - the number of positive divisors of n. What is the value of d(d(d(12))) ?

if quad (1)/(4)(3+d)+(1)/(4^(2))(3+2d)+.............oo=8 then the value of d is

for a fixed positive integer n let then (D)/((n-1)!(n+1)!(n+3)!) is equal to

Let d(n) denote the number of positive divisors of a positive integer n. Which of the following are correct? 1. d(5) = d(11) 2. d(5).d(11) = d(55) 3.d(5) + d(11) = d(16) Select the correct answer using the code given below :