Answer:
2, there'd be more, but natural numbers are like, whole numbers, integers basically except they're like non-negative integers. Enough ranting. So 4 and 8 would be the numbers because they are mulitplied by 4,1, and 2.
Since 4 cant go into 10 completely without a decimal, there'd only be 2 multiples.
Confusing explanation, but i think my answer is correct. (or is it, dun dun dun!)
Have a good day~