Every number has 1 as a factor.6 and 9 are not factors of 1 as they are both greater than 1 andall factors of a number are less than or equal to the number.The least whole number with 6 and 9 as factors is the lowestcommon multiple of 6 and 9lcm(6, 9) = 186 = 2 × 39 = 3²→ Lcm = 2 × 3² = 18