A:
Positive:
1 x 405400877 x 579144117 x 2384711101 x 401387119 x 340673707 x 573411717 x 236113373 x 12019
Negative:
-1 x -40540087-7 x -5791441-17 x -2384711-101 x -401387-119 x -340673-707 x -57341-1717 x -23611-3373 x -12019
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 40,540,087, 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 | 40,540,087 | |
| -1 | -40,540,087 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 40,540,087.
Example:
1 x 40,540,087 = 40,540,087
and
-1 x -40,540,087 = 40,540,087
Notice both answers equal 40,540,087
With that explanation out of the way, let's continue. Next, we take the number 40,540,087 and divide it by 2:
40,540,087 ÷ 2 = 20,270,043.5
If the quotient is a whole number, then 2 and 20,270,043.5 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 | 40,540,087 | |
| -1 | -40,540,087 |
Now, we try dividing 40,540,087 by 3:
40,540,087 ÷ 3 = 13,513,362.3333
If the quotient is a whole number, then 3 and 13,513,362.3333 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 | 40,540,087 | |
| -1 | -40,540,087 |
Let's try dividing by 4:
40,540,087 ÷ 4 = 10,135,021.75
If the quotient is a whole number, then 4 and 10,135,021.75 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 | 40,540,087 | |
| -1 | 40,540,087 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 101 | 119 | 707 | 1,717 | 3,373 | 12,019 | 23,611 | 57,341 | 340,673 | 401,387 | 2,384,711 | 5,791,441 | 40,540,087 |
| -1 | -7 | -17 | -101 | -119 | -707 | -1,717 | -3,373 | -12,019 | -23,611 | -57,341 | -340,673 | -401,387 | -2,384,711 | -5,791,441 | -40,540,087 |
Here are some more numbers to try:
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