0%

# Problem 608

## Divisor Sums

Let $D(m,n)=\displaystyle\sum_{d|m}\sum_{k=1}^n\sigma_{\small 0}(kd)$ where $d$ runs through all divisors of $m$ and $\sigma_{\small 0}(n)$ is the number of divisors of $n$.
You are given $D(3!,10^2)=3398$ and $D(4!,10^6)=268882292$.

Find $D(200!,10^{12}) \text{ mod } (10^9 + 7)$.