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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
I used the following method to calculate sumSquareFactors... for loop with i = 2 -> upperLimit where the upper limit is changed each time you find another number that is the factor. so that upperLimit = givenNumber / i. Not sure if optimal.
in java it should be matrix[0][0] since matrix is int[][] not int[]