As a heads up, http://oeis.org/A138591 counts 1 as a polite number, but the test suite does not.
Omit columns averages from a matrix
Project Euler: Problem 8, Find largest product in a large string of numbers
Back to basics 11 - Max Integer
Will there be a new leader?
Polite numbers. Politeness.
Which permutation is it?
expand intervals vol.2
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