A:
Positive:
1 x 1890077923 x 82177329 x 65175143 x 439553659 x 28681667 x 28337989 x 191111247 x 15157
Negative:
-1 x -18900779-23 x -821773-29 x -651751-43 x -439553-659 x -28681-667 x -28337-989 x -19111-1247 x -15157
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 18,900,779, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 18,900,779 | |
| -1 | -18,900,779 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,900,779.
Example:
1 x 18,900,779 = 18,900,779
and
-1 x -18,900,779 = 18,900,779
Notice both answers equal 18,900,779
With that explanation out of the way, let's continue. Next, we take the number 18,900,779 and divide it by 2:
18,900,779 ÷ 2 = 9,450,389.5
If the quotient is a whole number, then 2 and 9,450,389.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 18,900,779 | |
| -1 | -18,900,779 |
Now, we try dividing 18,900,779 by 3:
18,900,779 ÷ 3 = 6,300,259.6667
If the quotient is a whole number, then 3 and 6,300,259.6667 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 18,900,779 | |
| -1 | -18,900,779 |
Let's try dividing by 4:
18,900,779 ÷ 4 = 4,725,194.75
If the quotient is a whole number, then 4 and 4,725,194.75 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 18,900,779 | |
| -1 | 18,900,779 |
If you did it right, you will end up with this table:
| 1 | 23 | 29 | 43 | 659 | 667 | 989 | 1,247 | 15,157 | 19,111 | 28,337 | 28,681 | 439,553 | 651,751 | 821,773 | 18,900,779 |
| -1 | -23 | -29 | -43 | -659 | -667 | -989 | -1,247 | -15,157 | -19,111 | -28,337 | -28,681 | -439,553 | -651,751 | -821,773 | -18,900,779 |
Here are some more numbers to try:
Try the factor calculator