Java 8, 151 111 110 101 98 bytes
n->{int r=0,x=10000,i;for(;x-->0;r-=i-n>>-1)for(i=x;i-->1&&(x<i*i|x%i>0||(i=x/i-i)>i););return r;}
-10 bytes thanks to @Nevay.
-3 bytes thanks to @ceilingcat.
Explanation:
n->{ // Method with integer as parameter and return-type
int r=0, // Result-integer, starting at 0
x=10000, // Index-integer `x` for the outer loop, starting at 10,000
i; // Index-integer `i` for the inner loop, uninitialized
for(;x-->0; // Loop `x` in the range (10000, 0]:
r-=i-n>>-1) // If the MaxMin-Divisor Pair's difference is lower than the input,
// add 1 to the result (after every iteration)
for(i=x;i-->1 // Inner loop `i` in the range (`x`, 1]:
&&(x<i*i // If the current square of `i` is smaller than or equals to `x`,
|x%i>0 // and the current `x` is divisible by `i`:
||(i=x/i-i)// Calculate the MaxMin-Division difference
>i);); // And stop the inner loop
return r;} // After the loops, return the result