7 is prime, so it's lowest common multiple with anything that isn't itself a multiple of 7 (in which case the LCM would just be the other number itself) is that number times seven (in this case, 175).

The least common multiple (LCM) refers to a multiple that is COMMON to two or more numbers. You have only one number in the question! The least multiple of a number is itself.

The least common multiple is the least factor that can be common in every number. In algebra , L.C.M of 19, 7 and 4 is 19 *7* 4 =532. 532 is the least common multiple of 19 7 and 4.