gistfile1.txt

function factorize (x) {
	for (var i = 2 ; i <= Math.sqrt(x) ; i++) {
		if (x % i === 0) return [i].concat(factorize(x/i));
	}
	
	return [x];
}

function f (x) {
	var numbers = [];
	var nof = [];
		
	for (var i = 2 ; i <= x ; i++) {
		var n = factorize(i);
		for (var t = 0 ; t < n.length ; t++) {
			if (numbers.indexOf(n[t]) > -1) {
				nof[numbers.indexOf(n[t])]++
			} else {
				numbers.push(n[t]);
				nof.push(1);
			}
		}
	}
	return nof.reduce(function (s, n) {
		return s + s*n;
	}, 1);
}