245, 490, 735, 980 . . .
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7, 14, 21, 28, 35, 42, 49
28, 35, 42, 49, 56
They are: 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91 and 98.
7,14,21,28 If you want more 35 43 49 56 63 70 then it restarts
The factors are 1, 7 and 49. The multiples are 0, 49, 98, 147, 196 ... (just keep adding 49)