Good afternoon! I am a programmer-beginner. I have written the code for this task on c++, but the time limit is exceeded on the second test!
The code is this: (https://ideone.com/Rh98zQ)

#include <iostream>
using namespace std;

float ghj(int a)
{int m;
m=0;
for(int l=1; l<a; l++)
{if(a%l==0)
{m=m+l;}}
float c=(float(int(m)));
float b=c/a;
return b;}

int main() {
int i,j;
cin >> i >> j;
float p=ghj(i);
int n=i;
for(int o=i; o<=j; o++)
{if(ghj(o)<p)
{p=ghj(o);
n=o;}}
cout << n;
return 0;
}

Tell me, please, how can I optimize the code?