1) 40 * 25 = 1 000 = (2*2*2) * (5*5*5)
2) 12 * 35 = 420 = (2*2) * 3 * 5 * 7
3) 10 * 164 = 1 640 = (2*2*2) * 5 * 41
4) 8 * 125 = 1 000 = (2*2*2) * (5*5*5)
5) 64 * 125 = 8 000 = (2*2*2*2*2*2) * (5*5*5)
6) 112 * 147 = 16 464 = (2*2*2*2) * 3 * (7*7*7)
7) 37 * 1001 = 37 037 = 7 * 11 * 13 * 37
8) 57 * 201 = 11 457 = (3*3) * 19 * 67
9) 136 * 725 = 98 600 = (2*2*2) * (5*5) * 17 * 29
10) 56 * 900 = 50 400 = (2*2*2*2*2) * (3*3) * (5*5) * 7