Arithmetic derivative: Difference between revisions

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<lang J>D=: {{ +/y%q:1>.|y }}"0</lang>


In other words: find the sum of the argument divided by each of the sequence of prime factors of its absolute value (with a special case for zero).
In other words: find the sum of the argument divided by each of the sequence of prime factors of its absolute value (with a special case for zero -- we use the maximum of either 1 or that absolute value when finding the sequence of prime factors).


Task example:
Task example: