#P10979. [2015杭电多校]GCD?LCM!
[2015杭电多校]GCD?LCM!
GCD?LCM!
Problem Description
First we define: (1) , the least common multiple of two integers and , is the smallest positive integer that is divisible by both and . for example, and . (2) , the greatest common divisor of two integers and , is the largest positive integer that divides both and without a remainder, and . (3) , is a logical expression, if the result of is , then , else . for example, and . Now Stilwell wants to calculate such a problem:
$$F(n)=\sum_{i=1}^n\sum_{j=1}^n~[~lcm(i,j)+gcd(i,j)\geq n~] \\ S(n)=\sum_{i=1}^nF(i)$$Find .
Input
The first line of the input contains a single number , the number of test cases. Next lines, each line contains a positive integer . , .
Output
lines, find .
Sample Input
8
1
2
3
4
10
100
233
11037
Sample Output
1
5
13
26
289
296582
3928449
213582482
Author
SXYZ
Source
2015 Multi-University Training Contest 8