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- #include <stdio.h>
- #include <math.h>
- int SoHoanHao(int n)
- {
- int S=1;
- for (int i=2; i<=sqrt(n); i++)
- {
- if(n%i==0)
- {
- S+=i;
- if(n/i!=i)
- S+=n/i;
- }
- }
- if (S==n)
- return 1;
- else
- return 0;
- }
- int main()
- {
- int n;
- scanf("%d", &n);
- for (int i = 2; i <= n; i++) {
- SoHoanHao(i) ? printf("%d ", i) : printf("");
- }
- return 0;
- }
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