Problem 57685. Easy Sequences 95: LCM Sums

Ramon Villamangca

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For a given n, write the function lcmSum(n), defined as follows:
                    
For example for :
  >> lcmSum = @(n) sum(lcm(n,1:n));
  >> lcmSum(20)
  ans =
        2320
Since the sum grows very fast, please present your answer as a character string array and please limit the cody program size of the function to 150. 

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Last Solution submitted on Jun 03, 2026

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