Almost Perfect Numbers/Examples/16/Proof 1

Example of Almost Perfect Number

$16$ is an almost perfect number.


Proof

The divisors of $16$, not including $16$ itself are:

$1, 2, 4, 8$

Thus we have:

$1 + 2 + 4 + 8 = 15 = 16 - 1$

Hence the result by definition of almost perfect.


Sources

  • 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $16$
  • 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $16$
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