270 = 2 ⋅ 3 3 ⋅ 5 {\displaystyle 270=2\cdot 3^{3}\cdot 5} and 272 = 2 4 ⋅ 17 {\displaystyle 272=2^{4}\cdot 17} .
Але 35 ⋅ 7 = 5 ⋅ 7 2 {\displaystyle 35\cdot 7=5\cdot 7^{2}} прадставіць можна: 245 = 7 2 + 14 2 . {\displaystyle 245=7^{2}+14^{2}.}