How about: 3 times 49 equals 147
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the factors are - 1,3, 7,21 ,49, and 147. this is how they connect - 1x147=147, 3x49=147, 7x21=147.
147
The greatest common factor of 147 and 196 is 49.
42 63 84 105 126 147 168 189 210 and so on ...
The least common multiple of these numbers is 441.