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- // Tinh tong cac uoc so nguyen duong
- // khai bao ham thu vien
- #include<stdio.h>
- #include<conio.h>
- int soNT(int n);
- void main()
- {
- int n;
- scanf("%d",&n);
- long tong=1;
- if(n==0)
- {
- printf("0");
- }
- else
- {
- for(int i=1;i<=n;i++)
- {
- if(n%i==0)
- if(soNT(i)==1)
- {
- tong=tong+i;
- }
- }
- printf("%ld",tong);
- }
- }
- int soNT(int n)
- {
- int dem =0;
- for(int i=1;i<=n;i++)
- {
- if(n%i==0)
- dem++;
- }
- if(dem==2)
- return 1; // so nguyen to
- else
- return 0; // khong la so nguyen to
- }
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