§ Задание 28
\[\boxed{\mathbf{2.}\mathbf{28}}\]
\[27 = 1 \cdot 27 = 3 \cdot 9\]
\[46 = 1 \cdot 46 = 2 \cdot 23\]
\[90 = 1 \cdot 90 = 2 \cdot 45 = 3 \cdot 30 =\]
\[= 5 \cdot 18 = 6 \cdot 15 = 9 \cdot 10\]
\[\boxed{\mathbf{2.}\mathbf{28}}\]
\[27 = 1 \cdot 27 = 3 \cdot 9\]
\[46 = 1 \cdot 46 = 2 \cdot 23\]
\[90 = 1 \cdot 90 = 2 \cdot 45 = 3 \cdot 30 =\]
\[= 5 \cdot 18 = 6 \cdot 15 = 9 \cdot 10\]