0 is a multiple of 1, and an integer can be divisible by another integer, which is a multiple of another integer. The first rule of divisibility is that any integer can be divisible by 1 A number has countless multiples, which means that the set of multiples of a number is infinite.

Divide 0 by any number to get 0, and there is no remainder, that is, 0 is a multiple of any non-zero natural number, and any non-zero natural number is a factor of 0. Multiplication and factorization are interdependent. No multiple, no factor, no factor, no multiple. You can't say that a number is a multiple or a factor alone.