$$\displaystyle \left \lfloor \frac{n}{1 \times 2 \times \dots \times \sqrt{N}} \right \rfloor - \left \lceil \frac{n}{1 \times 2 \times \dots \times \sqrt{N}} \right \rceil$$
$$\displaystyle \left \lfloor \frac{n}{1 \times 2 \times \dots \times \sqrt{N}} \right \rfloor - \left \lceil \frac{n}{1 \times 2 \times \dots \times \sqrt{N}} \right \rceil$$