Divisors of 144
1 | 2 | 3 | 4 | 6 | 8 | 9 | 12 | 16 | 18 | 24 | 36 | 48 | 72 | 144
Divisors of 196
1 | 2 | 4 | 7 | 14 | 28 | 49 | 98 | 196
The ones that divide one but not both (not including 144 and 196 ) are
3 6 7 8 9 12 14 16 18 24 28 36 48 49 72 98
+321 
