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2013-09-07T19:15:23+02:00
PGCD:                                  Les diviseurs communs:
1a.  18                              1a. 1,2,3,
1b.  23                              1b. 1,23
1c. 1                                 1c. 1
2a. 11                                2a. 1,11
2b. 4                                 2b. 1,2,4
2c. 1                                 2c. 1