4. a) 5440 = 26 · 5 · 17
The steps involved in this were: 5440 = 2 · 2720 = 22 · 1360 = 23 · 680 = 24 · 340 = 25 · 170 = 26 · 85 = 26 · 5 · 17.
b) 43560 = 23 · 32 · 5 · 112
The steps involved in this were: 43560 = 2 · 21780 = 22 · 10890 = 23 · 5445 = 23 · 3 · 1815 = 23 · 32 · 605 = 23 · 32 · 5 · 121 = 23 · 32 · 5 · 112