1
One is.
The number 1.
Only the number 1 is a factor of all other integers.
Possiblilty is almost 1/2 cause every two numbers is a number with a factor of 2.From 2: 2,3,4,5,6,7,8,9,10...
All even numbers have two as a factor.
All numbers have themselves as factors.
All numbers can be factors.
1
No, its not.
One is.
1 is a factor of all positive numbers.
Yes, all number with have the factor 1 and itself.