There are infinite multiples of 19, but 10 of them are 19, 38, 57, 76, 95, 114, 133, 152, 171 and 190. Multiples of a number are products of that number and any whole number. Because numbers are infinite, multiples of any number are also infinite.
The multiples of 19 include any number into which 19 is evenly divisible. In mathematical terminology, every multiple of 19 has 19 as one of its factors. A factor of a given number is a number that divides evenly into that number. The number 19 is a multiple of itself because 19 times 1 is 19.