Question: 18 can be divided by?
Answer: The list of all positive divisors (i.e., the list of all integers that divide 18) is as follows: 1, 2, 3, 6, 9, 18. For 18 to be a prime number, it would have been required that 18 has only two divisors, i.e., itself and 1. Find out more: What is a prime number?