Ответ:

  1. 144 = 16 · 9 = \(2^4\cdot 3^2\).

  2. 624 = 16 · 39 = \(2^4\cdot 3\cdot 13\).

  3. 1960 = 8 · 245 = \(2^3\cdot 5\cdot 7^2\).

  4. 3920 = 16 · 245 = \(2^4\cdot 5\cdot 7^2\).