enumerateFactorsOfN.c

#include <math.h> // gcc -lm enumerateFactorsOfN.c

int enumerateFactorsOfN(int n) {
	int factors = 1;
	double sqrtN = sqrt(n);
	int n2 = (int) sqrtN;

	for (int i = 1; i <= n2; i++) {
		if (n % i == 0) {
			factors++;
		}
	}

	factors *= 2;

	if (sqrtN == n2) {
		factors--;
	}

	return factors;
}