A:
Positive:
1 x 401304055 x 80260817 x 573291535 x 11465831021 x 393051123 x 357355105 x 78615615 x 7147
Negative:
-1 x -40130405-5 x -8026081-7 x -5732915-35 x -1146583-1021 x -39305-1123 x -35735-5105 x -7861-5615 x -7147
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 40,130,405, 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 | 40,130,405 | |
| -1 | -40,130,405 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 40,130,405.
Example:
1 x 40,130,405 = 40,130,405
and
-1 x -40,130,405 = 40,130,405
Notice both answers equal 40,130,405
With that explanation out of the way, let's continue. Next, we take the number 40,130,405 and divide it by 2:
40,130,405 ÷ 2 = 20,065,202.5
If the quotient is a whole number, then 2 and 20,065,202.5 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 | 40,130,405 | |
| -1 | -40,130,405 |
Now, we try dividing 40,130,405 by 3:
40,130,405 ÷ 3 = 13,376,801.6667
If the quotient is a whole number, then 3 and 13,376,801.6667 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 | 40,130,405 | |
| -1 | -40,130,405 |
Let's try dividing by 4:
40,130,405 ÷ 4 = 10,032,601.25
If the quotient is a whole number, then 4 and 10,032,601.25 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 | 40,130,405 | |
| -1 | 40,130,405 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 1,021 | 1,123 | 5,105 | 5,615 | 7,147 | 7,861 | 35,735 | 39,305 | 1,146,583 | 5,732,915 | 8,026,081 | 40,130,405 |
| -1 | -5 | -7 | -35 | -1,021 | -1,123 | -5,105 | -5,615 | -7,147 | -7,861 | -35,735 | -39,305 | -1,146,583 | -5,732,915 | -8,026,081 | -40,130,405 |
Here are some more numbers to try:
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