What numbers are not a factor of 60?

Numbers that are not factors of 60 are those that do not divide evenly into 60 without leaving a remainder. For example, prime numbers such as 7, 11, and 13 are not factors of 60 because they cannot divide 60 evenly. Additionally, any number that is not a divisor of 60, such as 25 or 49, would also not be a factor of 60. In general, any number that does not evenly divide into 60 without leaving a remainder is not a factor of 60.