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descompuneti in  produs de factori primi nr urm. : 11,12,13,14,15,16,17,18,19,20

Răspuns :

11=1*11
12=1*2*2*3
13=1*13
14=1*2*7
15=1*3*5
16=1*2*2*2*2
17=1*17
18=1*2*3*3
19=1*19
20=1*2*2*5