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 ////////////////////

const primeList = [2];
function isPrime(number) {
  for (let i = 0; i < primeList.length && primeList[i] <= Math.sqrt(number); i++) {
    if (number % primeList[i] === 0) {
      return false;
    }
  }
  return true;
}
function longestSequence(number) {
  if (number === 1) {
    return 1;
  }
  const solution = [];
  let primeListIndex = 0;
  let i = primeList[primeListIndex];
  while (i <= Math.sqrt(number) || number === 1) {
    if (number % i === 0) {
      solution.unshift(i);
      number = number / i;
    } else {
      primeListIndex++;
      if (primeListIndex >= primeList.length) {
        i++;
        while (!isPrime(i)){
          i++;
        }
        primeList.push(i);
      } else {
        i = primeList[primeListIndex];
      }
    }
  }
  solution.unshift(number);
  let sum = 1;
  let currentSum = 1;
  solution.forEach(num => {
    currentSum = currentSum * num;
    sum += currentSum;
  });
  return sum;
}

function combineNumber(numbers) {
  let sum = 0;
  numbers.forEach(number => sum += longestSequence(number));
  return sum;
}

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

}