factorial function

例句：

1. 1.The problem can be solved by factoring out the common factors.
   这个问题可以通过因式分解来解决。
2. 2.Factors play a crucial role in the growth of plants.
   因子在植物生长中起着关键作用。
3. 3. The company is considering factoring its debt to reduce its financial burden.
   该公司正在考虑将其债务进行因式分解以减轻财务负担。