Answer :
21904
= 2 x 10952
= 2 x 2 x 5476
= 2 x 2 x 2 x 2738
= 2 x 2 x 2 x 2 x 1369
= 2 x 2 x 2 x 2 x 37 x 37
= (2 x 2 x 37) x (2 x 2 x 37)
= 148 x 148
= 2 x 10952
= 2 x 2 x 5476
= 2 x 2 x 2 x 2738
= 2 x 2 x 2 x 2 x 1369
= 2 x 2 x 2 x 2 x 37 x 37
= (2 x 2 x 37) x (2 x 2 x 37)
= 148 x 148
