process.stdin.resume();
process.stdin.setEncoding('ascii');

var input_stdin = "";
var input_stdin_array = "";
var input_currentline = 0;

process.stdin.on('data', function (data) {
    input_stdin += data;
});

process.stdin.on('end', function () {
    input_stdin_array = input_stdin.split("\n");
    main();    
});

function readLine() {
    return input_stdin_array[input_currentline++];
}

/////////////// ignore above this line ////////////////////

function getPrimes(max) {
    var sieve = [], i, j, primes = [];
    for (i = 2; i <= max; ++i) {
        if (!sieve[i]) {
            // i has not been marked -- it is prime
            primes.push(i);
            for (j = i << 1; j <= max; j += i) {
                sieve[j] = true;
            }
        }
    }
    return primes;
}

var primes = getPrimes(1000000);

function longestSequence(a) {
    let arraySums = a.map(function(a){
        if(a === 1){return 1;}
        let sum = a;
        while(a % 2 === 0){
            a = a / 2;
            sum+=a;
        }
        while(a !== 1){
          let ind = primes.indexOf(a);
            if(ind > -1){
                a = a / primes[ind];
                sum+=a;
            } else{
                loop:
                for(let i=1;i<primes.length;i++){
                    if(a % primes[i] === 0){
                        a = a / primes[i];
                        sum+=a;
                        break loop;
                    }
                }
            }  
        }
        
        return sum;  
    });
    let totalSum = 0;
    for(let i=0;i<arraySums.length;i++){
        totalSum+=arraySums[i];
    }
    return totalSum;
}

function main() {
    var n = parseInt(readLine());
    a = readLine().split(' ');
    a = a.map(Number);
    var result = longestSequence(a);
    process.stdout.write("" + result + "\n");

}