Решение:
- а) 72
\( 72 = 2 \times 36 = 2 \times 2 \times 18 = 2 \times 2 \times 2 \times 9 = 2 \times 2 \times 2 \times 3 \times 3 = 2^3 \times 3^2 \) - б) 130
\( 130 = 10 \times 13 = 2 \times 5 \times 13 \) - в) 315
\( 315 = 5 \times 63 = 5 \times 9 \times 7 = 5 \times 3 \times 3 \times 7 = 3^2 \times 5 \times 7 \) - г) 385
\( 385 = 5 \times 77 = 5 \times 7 \times 11 \)
Ответ: а) \( 2^3 \times 3^2 \); б) \( 2 \times 5 \times 13 \); в) \( 3^2 \times 5 \times 7 \); г) \( 5 \times 7 \times 11 \).