so

#! /bin/bash

if [ $# -lt 3 ]
    then
        echo "Usage: $0 <file> n1 n2..."
fi

if [ -f $1 ]
    then
        while read n
            do
               # rez=`echo $n | grep -Eo '[0-9]+'`
                #if [ ! -z "$rez" ]
                 #   then
                  #      nr=$rez
                   #     break
                    #else
                     #   echo "Eroare"
                      #  exit 1
                #fi
                if ! [[ "$n" =~ [0-9]+ ]]
                then
                    echo "Nu exista n"
                    exit -1
                    else
                    nr=$n
                fi

        done < $1

        echo "$nr"

        if [ $nr -eq 0 ]
            then
                echo "not found"
                exit 1
            else
                for i in "${@:2}"
                    do
                        if [ $(($i % $nr)) -eq 0 ]
                            then
                                s=$(($s + ${#i}))
                            fi
                    done
        fi
else
    echo "$1 not a regular file"
    exit 1
fi
echo "suma este $s"