Разложите на простые множители 
810;
252;
1110;
11;
1001;
1225;
21780;
45630.

810  2      810=2*3*3*3*3*5        252  2       252=2*2*3*3*7   405  3                                      126  2 135  3                                        63  3 45  3                                         21  3 15  3                                           7  7  5  5                                            1  11110  2         1110=2*3*5*37         11  11      11=11  555  3                                         1  185  5    37  37      11001  7          1001=7*143              1225  5            1225=5*5*7*7 143  143                                        245  5     1                                                49  7                                                                  7  7                                                         1 21780  2        21780=2*2*3*3*5*121        45630  2     45630=2*3*3*3*5*16910890  2                                              22815  3  5445  3                                                7605  3  1815  3                                                2535  3      605  5                                                 845  5    121  121                                             169  169       1                                                        1