function divisor(num){
var results = [];
for(var i=1; i<=num; i++) {
if( (num%i == 0) ) {
results.push(i);
}
}
return results;
}
// テスト
r = divisor(1024);
console.log(r);
// [1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024]
consooe.log(r.length);
// 11
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