C Program Runs Surprisingly Slow

C Program Runs Surprisingly Slow

A simple program I wrote in C takes upwards of half an hour to run. I am
surprised that C would take so long to run, because from what I can find
on the internet C ( aside from C++ or Java ) is one of the faster
languages.
// this is a program to find the first triangular number that is divisible
by 500 factors
int main()
{
int a; // for triangular num loop
int b = 1; // limit for triangular num (1+2+3+......+b)
int c; // factor counter
int d; // divisor
int e = 1; // ends loop
long long int t = 0; // triangular number in use
while( e != 0 )
{
c = 0;
// create triangular number t
t = t + b;
b++;
// printf("%lld\n", t); // in case you want to see where it's at
// counts factors
for( d = 1 ; d != t ; d++ )
{
if( t % d == 0 )
{
c++;
}
}
// test to see if condition is met
if( c > 500 )
{
break;
}
}
printf("%lld is the first triangular number with more than 500 factors\n",
t);
getchar();
return 0;
}
Granted the program runs through a lot of data, but none of it is ever
saved, just tested and passed over.
I am using the Tiny C Compiler on Windows 8.
Is there a reason this runs so slowly? What would be a faster way of
achieving the same result?
Thank you!