1 x 18
2 x 9
3 x 6
2 x 3 x 3
18 = 2 x 3 x 3
so
1, 2, 3, 6, 9, and 18 are all factors
The factors are 1, 18, 2, 9, 3 and 6.
39
There is only one factor of 18 that's equal to 9.That factor is 9 .
25 and 18 are a factor pair of 450 whose sum is 43.
5 + 2 = 7
Since 18 is a factor of 72, all of its factors are common.
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.
There is only one factor of 18 that's equal to 9.That factor is 9 .
25 and 18 are a factor pair of 450 whose sum is 43.
-18, -3 and -2
5 + 2 = 7
9, 18, 27, ... All numbers whose digital sum is 9. A digital sum is the sum of all the digits of a number. If the sum happens to be greater than 9 then repeat the process of obtaining a digital sum until the result is 9 or smaller.
18 and 81
18 & 81, 27 & 72, 36 & 63, 45 & 54 all fit the description.
Since 18 is a factor of 72, all of its factors are common.
2, 3, and 13 are all prime numbers and their sum is equal to 18.
Since 9 is a factor of 18, all of its factors are common (not cimmin).
There are 3 factor pairs of 18: 18 = 1 x 18 18 = 2 x 9 18 = 3 x 6
The factors from greatest to least are: 11,11,5,3,3. The smallest prime factor is 3. You can get a quick idea of this by the fact that the digital root (number that goes evenly into the sum off all digits) is 18 which is divisible by 3.