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 getAllDeviders(number) {
  let currentDevider = 2;
  const deviders = [];
  
  while (currentDevider <= number) {
    if (number % currentDevider === 0) {
      number = number / currentDevider;
      deviders.push(currentDevider);
    } else {
      currentDevider++;
    }
  }
  
  return deviders.reverse();
}

function longestSequence(a) {
  const lengthList = a.map(element => {
    let currentSum = 0;
    let currentElement = 1;
    const deviders = getAllDeviders(element);
    deviders.forEach(devider => {
      currentSum += currentElement;
      currentElement *= devider;
    })
    
    currentSum += currentElement;
    
    return currentSum;
  })
  
  const sum = lengthList.reduce((total, element) => total + element, 0);
  
  return sum;
}

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

}