natural numbers that are factors of 16

natural numbers that are factors of 16

Natural numbers are positive integers starting at 1.
{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}

Of these, the only factors of 16 are:
{1, 2, 4, 8, 16}