Code: Select all

```
(defun factor-loop (num)
(let ((factors = '(1)) (remainder = nil) (current-num = (/ num (apply #'* factors))))
(loop do (loop with x = 0
while (or (= (rem num x) 0) (<= x (/ num 2)) (current-num = (/ num (apply #'* factors))))
finally ((setf remainder (rem num x))(return)))
appending factors remainder))
return factors)
```

Code: Select all

```
*** - LOOP: illegal syntax near REMAINDER in
(LOOP WITH FACTORS = '(1) AND CURRENT-NUM = (/ NUM (APPLY #'* FACTORS))
AND REMAINDER = NIL DO
(LOOP WITH X = 0 WHILE (OR (= (REM NUM X) 0) (<= X (/ NUM 2))) FINALLY
((SETF REMAINDER (REM NUM X)) (RETURN)))
APPEND FACTORS REMAINDER)
```