A:
Positive:
1 x 405007855 x 810015713 x 311544565 x 62308989 x 455065445 x 910131157 x 350055785 x 7001
Negative:
-1 x -40500785-5 x -8100157-13 x -3115445-65 x -623089-89 x -455065-445 x -91013-1157 x -35005-5785 x -7001
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 40,500,785, 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 | 40,500,785 | |
| -1 | -40,500,785 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 40,500,785.
Example:
1 x 40,500,785 = 40,500,785
and
-1 x -40,500,785 = 40,500,785
Notice both answers equal 40,500,785
With that explanation out of the way, let's continue. Next, we take the number 40,500,785 and divide it by 2:
40,500,785 ÷ 2 = 20,250,392.5
If the quotient is a whole number, then 2 and 20,250,392.5 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 | 40,500,785 | |
| -1 | -40,500,785 |
Now, we try dividing 40,500,785 by 3:
40,500,785 ÷ 3 = 13,500,261.6667
If the quotient is a whole number, then 3 and 13,500,261.6667 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 | 40,500,785 | |
| -1 | -40,500,785 |
Let's try dividing by 4:
40,500,785 ÷ 4 = 10,125,196.25
If the quotient is a whole number, then 4 and 10,125,196.25 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 | 40,500,785 | |
| -1 | 40,500,785 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 89 | 445 | 1,157 | 5,785 | 7,001 | 35,005 | 91,013 | 455,065 | 623,089 | 3,115,445 | 8,100,157 | 40,500,785 |
| -1 | -5 | -13 | -65 | -89 | -445 | -1,157 | -5,785 | -7,001 | -35,005 | -91,013 | -455,065 | -623,089 | -3,115,445 | -8,100,157 | -40,500,785 |
Here are some more numbers to try:
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