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))) ?

Let d (n) denote the number of divisors of n including 1 and itself . Then d (225), d(1125) and d (640) are -

For all positive integers k, if the greatest divisor of 25^k + 12k -1 is d , then 4sqrtd =

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

Let d(n) denotes the number of divisors of n including 1 and itself. Then d(225), d(1125) and d(640) are

If A = diag (d_1,d_2,d_3,….d_n) then det A is equal to

If c and d are integers, is c-3d even? (1) c and d are odd. (2) c-2d is odd.

Let d(n) denote the number of divisors of n inciuding 1 and iteslf . Then d(225), d(1125) and d(640) are