Question 25
Let $f(n)$ be the number of positive integer factors of $n$. Find the smallest positive integer $n$ such that
$$f(n-2)=\frac13f(n).$$
Interpretation: The equation requires n ≥ 3 so that n − 2 is a positive integer.
Answer format: enter the integer answer without units. Leading zeros are optional; the original paper uses four-digit boxes.
$$f(n-2)=\frac13f(n).$$
Interpretation: The equation requires n ≥ 3 so that n − 2 is a positive integer.
Answer format: enter the integer answer without units. Leading zeros are optional; the original paper uses four-digit boxes.