> main()
> {
>     long long s,n,x,r,i;
>     while(scanf("%I64d",&n)+1){
>     s=1;
>     for(i=2;i*i<=n;i++){
>              if(n%i==0){
>              x=1;r=0;
>              while(n%i==0){
>              n/=i;x*=i;
>              r++;
>              } 
>              s*=(r+1)*x-r*x/i;         
>              }
>              }
>              if(n>1)s*=2*n-1;
>            printf("%I64d\n",s);
>              }
> }

• Re:100题贴代码 (15) qpyghb 2014-08-11 11:16:27
  • Re:100题贴代码 (23) qpyghb 2014-08-11 11:25:51