The least common multiple of 12 and 18 is 36. A multiple of 36, but not a multiple of 5 (that is, a multiple of 15 can be excluded) has three digits: 108,144,216,252,288,324,396,432,468. Exclude that 144, 288, 432, 576, 864 are multiples of 16 at the same time, leaving 15 to meet the conditions.