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#include <iostream>
#include <math.h>
int main(){
int n, som;
std::cout<<" Ce programme calcule les nombre parfaits inferieurs ou egaux a n, entrez n :"<<std::endl;
std:: cin >> n;
std::cout << " Les nombres parfaits inferieur ou egaux a " << n << " sont : " <<std::endl;
for ( int i = 4; i <= n; i ++) {
som = 1;
for ( int j=2; j <= i/2+1 ; j ++ ) {
if ( i % j== 0 ) {
som += j;
}
}
if ( som == i ) {
std::cout << som << std::endl;
}
}
return 0;
}
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