I'm sure I'm misunderstanding something because isn't 5=2+3, with 2 and 3 being the factors of 6?
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6 has 4 factors, 1,2,3 and 6.1+2+3+6=12. The definition given was really quite confusing tho.
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Untouchable number is natural number that can't be expressed as the sum of all the proper divisors of any natural number (including untouchable number itself). 5 is the only odd untouchable number iff Goldbach Conjecture is true.pic.twitter.com/3RVT2dT1fT
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Untouchable numbers :
#OEIS A005114 https://oeis.org/A005114Thanks. Twitter will use this to make your timeline better. UndoUndo
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that's not correct..... F.i : 235 = 5 * 47 and the sum is 52 !!! 415 = 5 * 83 and the sum is 88 !!! 451 = 11 * 41 and the sum is 52 !!! 498 = 2 * 3 * 83 and the sum is 88 !!! and there are many other examples......



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It's the sum of proper divisors, which includes 1, so for 235: 1+5+47 = 53.
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the first thing that came to mind was Fortnite.. I'm ruined
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Summing factors just seems wrong.
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Another untouchable number is “My Way” recorded by Frank Sinatra in 1969.
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