Each integer has a unique set of multiples.
An infinite number of of multiples of 88 can be divided by 88.
No number has the exact same multiples. Factors and multiples of 12 will have some of the same multiples.
If I understand the question correctly, the answer is 44 and 88.
22, 44, 66, 88 and so on.
No. Multiples can't be smaller than the number they are compared to.
common multiples
There is an infinite number of common multiples for 88 and 40. A common multiple of any two or more numbers is any number into which each of two or more numbers can be divided evenly (zero remainder).
Least common multiple is 88. Other multiples are 176, 264, 352, etc. and all integer multiples of 88.
By making a table of multiples and finding when the multiples for every number is the same.
88, 176, 264 and so on.
72 has similar multiples, 288 has similar multiples, but only 144 has its own distinct set of multiples.
There are too many to list here. An infinite number of them, in fact.88 is the first one. 176 is the next one, and from there, you encounteranother one every time you count up by another 88.