题目：1. Let d(n) denote the number of positive integers that divide n, including 1 and n. For example, d(1)=1, d(2)=2, and d(12)=6. (This function is known as the divisor function.) Let f(n)=d(n)/∛n. There is an integer number N which makes f(N)=max(f(n)). What is N?

俺的答案：
N=24，因为max(f(n))=f(24)≈2.77