A:
Positive:
1 x 203714455 x 407428923 x 88571547 x 433435115 x 177143235 x 866871081 x 188453769 x 5405
Negative:
-1 x -20371445-5 x -4074289-23 x -885715-47 x -433435-115 x -177143-235 x -86687-1081 x -18845-3769 x -5405
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 20,371,445, 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 | 20,371,445 | |
| -1 | -20,371,445 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,371,445.
Example:
1 x 20,371,445 = 20,371,445
and
-1 x -20,371,445 = 20,371,445
Notice both answers equal 20,371,445
With that explanation out of the way, let's continue. Next, we take the number 20,371,445 and divide it by 2:
20,371,445 ÷ 2 = 10,185,722.5
If the quotient is a whole number, then 2 and 10,185,722.5 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 | 20,371,445 | |
| -1 | -20,371,445 |
Now, we try dividing 20,371,445 by 3:
20,371,445 ÷ 3 = 6,790,481.6667
If the quotient is a whole number, then 3 and 6,790,481.6667 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 | 20,371,445 | |
| -1 | -20,371,445 |
Let's try dividing by 4:
20,371,445 ÷ 4 = 5,092,861.25
If the quotient is a whole number, then 4 and 5,092,861.25 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 | 20,371,445 | |
| -1 | 20,371,445 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 47 | 115 | 235 | 1,081 | 3,769 | 5,405 | 18,845 | 86,687 | 177,143 | 433,435 | 885,715 | 4,074,289 | 20,371,445 |
| -1 | -5 | -23 | -47 | -115 | -235 | -1,081 | -3,769 | -5,405 | -18,845 | -86,687 | -177,143 | -433,435 | -885,715 | -4,074,289 | -20,371,445 |
Here are some more numbers to try:
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