This is the 2645th most frequent Russian word.
фактор
Factor.
Here, 'фактор' is used to refer to a determining aspect or condition influencing a decision-making process.
Определяющим фактором в принятии решения стала цена.
The determining factor in making the decision was the price.
In this sentence, 'фактор' is used as a general term for elements or conditions affecting the outcome of an event or project.
Успех проекта зависит от множества факторов.
The success of the project depends on many factors.
The term 'фактор' here denotes external influences or conditions (environmental ones) impacting health.