Which of the following is typically NOT a factor in determining whether a contract is enforceable?

In contract law, the enforceability of a contract hinges on several critical factors, but the number of parties involved is typically not one of them. A contract involves at least two parties, and while the identities or specific number of parties might affect the dynamics of the agreement or the ability to fulfill it, the existence of just two parties is the fundamental requirement.

On the other hand, the clarity of the language in the contract is crucial as it affects the parties' understanding and intentions, which directly influences enforceability. The intention of the parties, often assessed through their actions and the contract's language, also plays a significant role, as contracts require a mutual agreement to be binding. Lastly, the legality of the contract's subject matter is essential since an enforceable contract must concern a legal activity or agreement; contracts based on illegal activities are void and unenforceable regardless of the other factors.