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Sep 16th, 2019
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  1. void sum_div_prim(int n,int &s)
  2. {
  3. s=0;
  4. int d,d1,ok=0;
  5. for(d=2;d*d<=n;d++)
  6. {
  7. if(n%d==0)
  8. {
  9. ok=0;
  10. for(d1=2;d1*d1<=d;d1++)
  11. if(d%d1==0)
  12. ok=1;
  13. if(ok==0)
  14. s+=d;
  15. if(d*d==n)
  16. s+=d;
  17. }
  18. }
  19. }
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