function solve (n) {
    let sumProperDiv = 0;

    for (let i = 1; i <= n; i++) {
        if (n % i == 0) {
            sumProperDiv += i;
        }
    }

    if (n == sumProperDiv / 2) {
        console.log('We have a perfect number!');
    } else {
        console.log("It's not so perfect.");
    }
}