Yes.
Bigger numbers make bigger factor trees, and of course there are prime numbers which cant be factored at all
All whole numbers yes
All whole numbers have factors.
One.
It is not possible to express something as a sum of whole numbers with no common factor. All whole numbers have at least 1 as a common factor.
1
All whole numbers have 1 as a factor because 1 is a universal factor for every integer. In mathematical terms, a factor is a number that divides another number without leaving a remainder, and since 1 divides every whole number evenly, it is a factor of all whole numbers. Therefore, every whole number, starting from 0, has 1 as a factor.
Two is a factor of all even numbers.
All whole numbers except for -1, 0 and 1 have at least one prime factor.
Yes, 5 is a factor of all whole numbers ending in 5.
Only 1.
One.