Problem 44230. I'm going to enjoy watching you calculate, Mr Anderson
Smith numbers are numbers such that if you add up all of the digits in the number, that sum equals the sum of all of the digits in all of their factors. This term was coined by Albert Wilansky, when he noticed the defining property in the phone number of his brother-in-law Harold Smith: 493-7775.
4+9+3+7+7+7+5=42
The prime factors of 4937775 are 3, 5, 5, and 65837. 3+5+5+(6+5+8+3+7) = 42
Since all prime numbers obviously meet this criteria, Smith numbers are defined as composite numbers. Write a MATLAB function that will tell you if a given number is a Smith number.
Solution Stats
Problem Comments
-
1 Comment
Dyuman Joshi
on 7 Jan 2023
Test cases are added to the problem.
Solution Comments
Show commentsProblem Recent Solvers42
Suggested Problems
-
Set the array elements whose value is 13 to 0
1351 Solvers
-
Sum the entries of each column of a matrix which satisfy a logical condition.
158 Solvers
-
399 Solvers
-
Back to basics - mean of corner elements of a matrix
405 Solvers
-
453 Solvers
More from this Author80
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!