Proper divisors: Difference between revisions
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Use <code>factor</code> to obtain the prime factorization of the target number. I adopted the argument handling style of <code>factor</code> in my <code>properdivisors</code> function.
<syntaxhighlight lang="julia">
using Primes
function properdivisors
0 < n || throw(ArgumentError("number to be factored must be ≥ 0, got $n"))
1 < n || return T[]
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