THE FACTORS OF 18 ARE 1,2,3,6,9 AND 18. these five numbers are divisible by 18 . so these five numbers are the factors of 18. explanation: 18 can be written as the multiples of i) 9x2 ii) 1x18 and iii) 6x3 these three options are the only multiples of 18. now its clear that the factors of a number is obviously the divisors of that number