题解 | #完全数计算#

// 完全数只有这几个
let arr = [6, 28, 496, 8128, 33550336]
let str
while(str = readline()){
    let result = 0
    arr.forEach(el => {
        if(el <= parseInt(str)){
            result++
        }
    })
    console.log(result)
}