Yes or No (or Ambiguous )?
Every even perfect number is a triangular number.
Note : A triangular number is a number that is of the form: and a perfect number is the sum of its divisors (excluding itself)
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
every perfect number is a form 2^k(2^(k+1)-1) so, 2^(k+1)(2^(k+1)-1)/2=n(n+1)/2 n=2^(k+1)-1