A:
Positive:
1 x 4020402111 x 365491113 x 3092617143 x 281147263 x 1528671069 x 376092893 x 138973419 x 11759
Negative:
-1 x -40204021-11 x -3654911-13 x -3092617-143 x -281147-263 x -152867-1069 x -37609-2893 x -13897-3419 x -11759
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 40,204,021, 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 | 40,204,021 | |
| -1 | -40,204,021 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 40,204,021.
Example:
1 x 40,204,021 = 40,204,021
and
-1 x -40,204,021 = 40,204,021
Notice both answers equal 40,204,021
With that explanation out of the way, let's continue. Next, we take the number 40,204,021 and divide it by 2:
40,204,021 ÷ 2 = 20,102,010.5
If the quotient is a whole number, then 2 and 20,102,010.5 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 | 40,204,021 | |
| -1 | -40,204,021 |
Now, we try dividing 40,204,021 by 3:
40,204,021 ÷ 3 = 13,401,340.3333
If the quotient is a whole number, then 3 and 13,401,340.3333 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 | 40,204,021 | |
| -1 | -40,204,021 |
Let's try dividing by 4:
40,204,021 ÷ 4 = 10,051,005.25
If the quotient is a whole number, then 4 and 10,051,005.25 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 | 40,204,021 | |
| -1 | 40,204,021 |
If you did it right, you will end up with this table:
| 1 | 11 | 13 | 143 | 263 | 1,069 | 2,893 | 3,419 | 11,759 | 13,897 | 37,609 | 152,867 | 281,147 | 3,092,617 | 3,654,911 | 40,204,021 |
| -1 | -11 | -13 | -143 | -263 | -1,069 | -2,893 | -3,419 | -11,759 | -13,897 | -37,609 | -152,867 | -281,147 | -3,092,617 | -3,654,911 | -40,204,021 |
Here are some more numbers to try:
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