342, 684, 1026, 1368, 1710, 2052, 2394, . . .
1, 2, 3, 6, 9, 18, 19, 38, 57, 114, 171, 342.
57, 114, 171, 228, 285, 342.
Multiples of 114 include 114, 228, 342 and so on. For them to be common, they need to be compared to another set of multiples.
114, 228, 342
38, 76, 114, 152, 190, 228, 266, 304, 342 . . .
114, 228, 342
57, 114, 171, 228, 285, 342, 399, 456, 513, 570, 627, . . .
38, 76, 114, 152, 190, 228, 266, 304, 342, 380, 418, . . .
57, 114, 171, 228, 285, 342, 399, 456, 513, 570, 627, 684, . . .
57, 114, 171, 228, 285, 342, 399, 456, 513, 570.
38, 76, 114, 152, 190, 228, 266, 304, 342, 380.
Infinite. The first ten are: 57, 114, 171, 228, 285, 342, 399, 456, 513, 570.