Competitions

# Азербайджан - подготовка. Март 16

# Sigma-function on a segment

Find

where **σ**(**i**) is the sum of positive divisors of number **i**.

#### Input

Contains no more than `10`

queries. Each query is given on a separate line and contains two numbers ^{5}**l** and **r** (**1** ≤ **l** ≤ **r** ≤ **5** * `10`

).^{6}

#### Output

For each query print on a separate line one number **S**(**l**, **r**).

Input example #1

3 10

Output example #1

83