Find the K-Beauty of a Number (Leetcode 2269)

Problem Link: https://leetcode.com/problems/find-the-k-beauty-of-a-number/

class Solution:
    def divisorSubstrings(self, num: int, k: int) -> int:
        
        s=str(num)
        n=len(s)
        i=0
        j=0
        ans=0
        tempstring=''
        while(j<n):
            tempstring=tempstring+s[j]
            
            if(j-i+1<k):
                j+=1
            
            elif(j-i+1==k):
                tempnumber=int(tempstring)
                if(tempnumber!=0):
                    if(num%tempnumber==0):
                        ans+=1
                tempstring=tempstring[1:]
                
                i+=1
                j+=1
        
        return ans