The PrimeFactors(n) command computes the prime factors of the integer n.

Every prime number divides 0 evenly, but one cannot represent the set of all prime numbers as an enumerated set. Therefore, PrimeFactors(0) returns an error.

$\mathrm{with}\left(\mathrm{NumberTheory}\right)\:$

$\mathrm{PrimeFactors}\left(3526\right)$

$\left\{2\,41\,43\right\}$

$\mathrm{PrimeFactors}\left(55557\right)$

$\left\{3\,6173\right\}$

$\mathrm{PrimeFactors}\left(-57\right)$

$\left\{3\,19\right\}$

$\mathrm{plots}:-\mathrm{pointplot}\left(\mathrm{`union`}\left(\mathrm{seq}\left(\mathrm{map}\left(p\mapsto \left[n\,p\right]\,\mathrm{PrimeFactors}\left(n\right)\right)\,n=1..1000\right)\right)\right)$

$\mathrm{PrimeFactors}\left(0\right)$

Error, (in NumberTheory:-PrimeFactors) cannot represent all prime factors of 0

The NumberTheory[PrimeFactors]  command was introduced in Maple 2016.

For more information on Maple 2016 changes, see Updates in Maple 2016.