Check boston number

#1

sir in this question i am unable to understand how we will find the sum of prime factors

#2

hi @abhinavai21_5c95a2a2e1fb9fe8,
here u need to find the number whose sum of digits are equal to sum of digits of its factor except 1

check here for implementation ive commented the code : https://ide.codingblocks.com/s/656874

#3

sir why limit of is till sqrt(n) in the solution

#4

@abhinavai21_5c95a2a2e1fb9fe8 that’s the optimised way to check you can go further but that will give TLE