A:
Positive:
1 x 206374077 x 294820167 x 30802179 x 261233469 x 44003553 x 37319557 x 370513899 x 5293
Negative:
-1 x -20637407-7 x -2948201-67 x -308021-79 x -261233-469 x -44003-553 x -37319-557 x -37051-3899 x -5293
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 20,637,407, 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 | 20,637,407 | |
| -1 | -20,637,407 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,637,407.
Example:
1 x 20,637,407 = 20,637,407
and
-1 x -20,637,407 = 20,637,407
Notice both answers equal 20,637,407
With that explanation out of the way, let's continue. Next, we take the number 20,637,407 and divide it by 2:
20,637,407 ÷ 2 = 10,318,703.5
If the quotient is a whole number, then 2 and 10,318,703.5 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 | 20,637,407 | |
| -1 | -20,637,407 |
Now, we try dividing 20,637,407 by 3:
20,637,407 ÷ 3 = 6,879,135.6667
If the quotient is a whole number, then 3 and 6,879,135.6667 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 | 20,637,407 | |
| -1 | -20,637,407 |
Let's try dividing by 4:
20,637,407 ÷ 4 = 5,159,351.75
If the quotient is a whole number, then 4 and 5,159,351.75 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 | 20,637,407 | |
| -1 | 20,637,407 |
If you did it right, you will end up with this table:
| 1 | 7 | 67 | 79 | 469 | 553 | 557 | 3,899 | 5,293 | 37,051 | 37,319 | 44,003 | 261,233 | 308,021 | 2,948,201 | 20,637,407 |
| -1 | -7 | -67 | -79 | -469 | -553 | -557 | -3,899 | -5,293 | -37,051 | -37,319 | -44,003 | -261,233 | -308,021 | -2,948,201 | -20,637,407 |
Here are some more numbers to try:
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