SP26073 DIVCNT1 - Counting Divisors
Description
Let $ \sigma_0(n) $ be the number of positive divisors of $ n $ .
For example, $ \sigma_0(1) = 1 $ , $ \sigma_0(2) = 2 $ and $ \sigma_0(6) = 4 $ .
Let
$$ S_1(n) = \sum _{i=1}^n \sigma_0(i). $$
Given $ N $ , find $ S_1(N) $ .
Input Format
N/A
Output Format
N/A