JAVA

getsmallestnumber

public static int getSmallestNumber(int input1) {
    int res =0;
    for(int i=2;i<10000;i++) {
        if(getSum(input1*i) == input1) {
        res = input1*i;
            break;
        }
            
    }
    return res;
}

static int getSum(int n) {    
    int sum = 0;
    while (n != 0) {
        sum = sum + n % 10;
        n = n/10;
    }
    return sum;
}