A:
Positive:
1 x 189073437 x 270104913 x 145441191 x 207773173 x 1092911201 x 157431211 x 156132249 x 8407
Negative:
-1 x -18907343-7 x -2701049-13 x -1454411-91 x -207773-173 x -109291-1201 x -15743-1211 x -15613-2249 x -8407
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 18,907,343, 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 | 18,907,343 | |
| -1 | -18,907,343 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,907,343.
Example:
1 x 18,907,343 = 18,907,343
and
-1 x -18,907,343 = 18,907,343
Notice both answers equal 18,907,343
With that explanation out of the way, let's continue. Next, we take the number 18,907,343 and divide it by 2:
18,907,343 ÷ 2 = 9,453,671.5
If the quotient is a whole number, then 2 and 9,453,671.5 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 | 18,907,343 | |
| -1 | -18,907,343 |
Now, we try dividing 18,907,343 by 3:
18,907,343 ÷ 3 = 6,302,447.6667
If the quotient is a whole number, then 3 and 6,302,447.6667 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 | 18,907,343 | |
| -1 | -18,907,343 |
Let's try dividing by 4:
18,907,343 ÷ 4 = 4,726,835.75
If the quotient is a whole number, then 4 and 4,726,835.75 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 | 18,907,343 | |
| -1 | 18,907,343 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 173 | 1,201 | 1,211 | 2,249 | 8,407 | 15,613 | 15,743 | 109,291 | 207,773 | 1,454,411 | 2,701,049 | 18,907,343 |
| -1 | -7 | -13 | -91 | -173 | -1,201 | -1,211 | -2,249 | -8,407 | -15,613 | -15,743 | -109,291 | -207,773 | -1,454,411 | -2,701,049 | -18,907,343 |
Here are some more numbers to try:
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