Output all composite numbers between 6 and 1000

subject ： Write a program to output in 6~1000 All the sums of , Composite refers to 1 The number equal to the sum of its factors . for example ,6=1+2+3,28=1+2+4+7+14, be 6、28 It's a total number .

int main(void)
{
    int i, k, sum;
    printf("6~1000 All composite numbers between ：\n");
    for (i = 6; i <= 1000; i++) // The range of the number judged by the outer loop control is 6-1000
    {
        sum = 0;
        for (k = 1; k < i; k++) // The inner loop finds the sum of the factors of a number 
            if (i % k == 0)
                sum += k;
        if (i == sum)           // Number of judgements i Whether it is the sum of its factors sum equal , If equal , Is a composite number 
            printf("%d\t", i);
    }
    return 0;
}