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| ANSI Common Lisp 12 Numbers 12.2 Dictionary of Numbers
12.2.34 lcm | Function
  Syntax: lcm `&rest` integers least-common-multiple Arguments and Values: integer - an integer. least-common-multiple - a non-negative integer. Description: lcm returns the least common multiple of the integers. If no integer is supplied, the integer `1` is returned. If only one integer is supplied, the absolute value of that integer is returned. For two arguments that are not both zero,
       (lcm a b) ==(/ (abs (* a b)) (gcd a b))
  If one or both arguments are zero,
       (lcm a 0) ==(lcm 0 a) ==0
  For three or more arguments,
       (lcm a b c ... z) ==(lcm (lcm a b) c ... z)
  Examples:
       (lcm 10)  10
       (lcm 25 30)  150
       (lcm -24 18 10)  360
       (lcm 14 35)  70
       (lcm 0 5)  0
       (lcm 1 2 3 4 5 6)  60
Exceptional Situations: Should signal type-error if any argument is not an integer. See Also: gcd Allegro CL Implementation Details: None.

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