A:
Positive:
1 x 2002135917 x 117772743 x 46561361 x 328219449 x 44591731 x 273891037 x 193072623 x 7633
Negative:
-1 x -20021359-17 x -1177727-43 x -465613-61 x -328219-449 x -44591-731 x -27389-1037 x -19307-2623 x -7633
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 20,021,359, 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 | 20,021,359 | |
| -1 | -20,021,359 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,021,359.
Example:
1 x 20,021,359 = 20,021,359
and
-1 x -20,021,359 = 20,021,359
Notice both answers equal 20,021,359
With that explanation out of the way, let's continue. Next, we take the number 20,021,359 and divide it by 2:
20,021,359 ÷ 2 = 10,010,679.5
If the quotient is a whole number, then 2 and 10,010,679.5 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 | 20,021,359 | |
| -1 | -20,021,359 |
Now, we try dividing 20,021,359 by 3:
20,021,359 ÷ 3 = 6,673,786.3333
If the quotient is a whole number, then 3 and 6,673,786.3333 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 | 20,021,359 | |
| -1 | -20,021,359 |
Let's try dividing by 4:
20,021,359 ÷ 4 = 5,005,339.75
If the quotient is a whole number, then 4 and 5,005,339.75 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 | 20,021,359 | |
| -1 | 20,021,359 |
If you did it right, you will end up with this table:
| 1 | 17 | 43 | 61 | 449 | 731 | 1,037 | 2,623 | 7,633 | 19,307 | 27,389 | 44,591 | 328,219 | 465,613 | 1,177,727 | 20,021,359 |
| -1 | -17 | -43 | -61 | -449 | -731 | -1,037 | -2,623 | -7,633 | -19,307 | -27,389 | -44,591 | -328,219 | -465,613 | -1,177,727 | -20,021,359 |
Here are some more numbers to try:
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