A:
Positive:
1 x 2000781237 x 2858258931 x 645413349 x 4083227107 x 1869889217 x 922019749 x 2671271231 x 1625331519 x 1317173317 x 603195243 x 381618617 x 23219
Negative:
-1 x -200078123-7 x -28582589-31 x -6454133-49 x -4083227-107 x -1869889-217 x -922019-749 x -267127-1231 x -162533-1519 x -131717-3317 x -60319-5243 x -38161-8617 x -23219
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 200,078,123, 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 | 200,078,123 | |
| -1 | -200,078,123 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 200,078,123.
Example:
1 x 200,078,123 = 200,078,123
and
-1 x -200,078,123 = 200,078,123
Notice both answers equal 200,078,123
With that explanation out of the way, let's continue. Next, we take the number 200,078,123 and divide it by 2:
200,078,123 ÷ 2 = 100,039,061.5
If the quotient is a whole number, then 2 and 100,039,061.5 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 | 200,078,123 | |
| -1 | -200,078,123 |
Now, we try dividing 200,078,123 by 3:
200,078,123 ÷ 3 = 66,692,707.6667
If the quotient is a whole number, then 3 and 66,692,707.6667 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 | 200,078,123 | |
| -1 | -200,078,123 |
Let's try dividing by 4:
200,078,123 ÷ 4 = 50,019,530.75
If the quotient is a whole number, then 4 and 50,019,530.75 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 | 200,078,123 | |
| -1 | 200,078,123 |
If you did it right, you will end up with this table:
| 1 | 7 | 31 | 49 | 107 | 217 | 749 | 1,231 | 1,519 | 3,317 | 5,243 | 8,617 | 23,219 | 38,161 | 60,319 | 131,717 | 162,533 | 267,127 | 922,019 | 1,869,889 | 4,083,227 | 6,454,133 | 28,582,589 | 200,078,123 |
| -1 | -7 | -31 | -49 | -107 | -217 | -749 | -1,231 | -1,519 | -3,317 | -5,243 | -8,617 | -23,219 | -38,161 | -60,319 | -131,717 | -162,533 | -267,127 | -922,019 | -1,869,889 | -4,083,227 | -6,454,133 | -28,582,589 | -200,078,123 |
Here are some more numbers to try:
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