#include <stdio.h>
#define VALMAX 1000
#define NRCFMAX 200
int d[VALMAX+1][NRCFMAX];
inline void aduna(int sursa, int unde){
    int ad, j;
    ad=0;
    j=1;
    while((j<=d[sursa][0])||(ad!=0)){
        ad+=d[sursa][j]+d[unde][j];
        d[unde][j]=ad%10;
        ad/=10;
        j++;
    }
    if(j-1>d[unde][0]){
        d[unde][0]=j-1;
    }
}
inline int cmmdc(int a, int b){
    int r;
    while(b!=0){
        r=a%b;
        a=b;
        b=r;
    }
    return a;
}
int main(){
    int n, i, x, j;
    FILE *fin, *fout;
    fin=fopen("indep.in", "r");
    fout=fopen("indep.out", "w");
    fscanf(fin, "%d", &n);
    d[0][0]=1;
    d[0][1]=1;
    for(i=0; i<n; i++){
        fscanf(fin, "%d", &x);
        for(j=1; j<=VALMAX; j++){
            aduna(j, cmmdc(x, j));
        }
        aduna(0, x);
    }
    for(i=d[1][0]; i>0; i--){
        fprintf(fout, "%d", d[1][i]);
    }
    fprintf(fout, "\n");
    fclose(fin);
    fclose(fout);
    return 0;
}