Question

If p is a prime,d(N) means number of divisors of N,then find d(d(d(p^5))).

Answer 1

Now, d(2)=2 and a prime has only two divisors(itself and one).
d(p^5)=(1+5)=6.
d(6)=4.
d(4)=3.
Hence, d(d(d(p^5)))=3.