Problem Description
There is a function f(x),which is defined on the natural numbers set N,satisfies the following eqaution
N2−3N+2=∑d|Nf(d)
calulate ∑Ni=1f(i) mod 109+7.
Input
the first line contains a positive integer T,means the number of the test cases.
next T lines there is a number N
T≤500,N≤109
only 5 test cases has N>106.
Output
Tlines,each line contains a number,means the answer to the i-th test case.
Sample Input
1
3
Sample Output
2
$1^2-3*1+2=f(1)=0$
$2^2-3*2+2=f(2)+f(1)=0->f(2)=0$
$3^2-3*3+2=f(3)+f(1)=2->f(3)=2$
$f(1)+f(2)+f(3)=2$
https://blog.csdn.net/AHU_waterspider/article/details/82785057