A number that divides into a whole number evenly is called a "factor" of that number.
Four does not go into 81 evenly. But as "evenly" was not a defined requirement for the answer. 4 goes into 81 20.25 times
One.
One.
Any of its factors
All of these: 1, 3, 9, 27, 81, 243, 729.
They're not. 81 is divisible by 1, 3, 9, 27, and 81. Those are called the "factors" of 81, because each of them divides evenly into 81 with no remainder.
A factor divides evenly into a given number.
The Greatest Common Divisor of two numbers is the largest number that will divide into both evenly. For example, although 27 and 81 are both divisible by 3, it wouldn't be the greatest common divisor, because 27 divides into 81 evenly as well: the greatest common divisor of 27 and 81 is 27.
A number that divides evenly into another number is called a factor.
1 is the smallest number that divides any positive integer evenly.
A factor divides evenly into a given number.
A number that divides into a whole number evenly is called a "factor" of that number.
Do the division, and see if there is a remainder.
The smallest prime number that divides 98 evenly is 2.
The smallest prime number that divides 147 evenly is three (3).
1, 3, 9, 27, 81