A:
Positive:
1 x 4004260155 x 8008520311 x 3640236555 x 72804731093 x 3663555465 x 732716661 x 6011512023 x 33305
Negative:
-1 x -400426015-5 x -80085203-11 x -36402365-55 x -7280473-1093 x -366355-5465 x -73271-6661 x -60115-12023 x -33305
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 400,426,015, 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 | 400,426,015 | |
| -1 | -400,426,015 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 400,426,015.
Example:
1 x 400,426,015 = 400,426,015
and
-1 x -400,426,015 = 400,426,015
Notice both answers equal 400,426,015
With that explanation out of the way, let's continue. Next, we take the number 400,426,015 and divide it by 2:
400,426,015 ÷ 2 = 200,213,007.5
If the quotient is a whole number, then 2 and 200,213,007.5 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 | 400,426,015 | |
| -1 | -400,426,015 |
Now, we try dividing 400,426,015 by 3:
400,426,015 ÷ 3 = 133,475,338.3333
If the quotient is a whole number, then 3 and 133,475,338.3333 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 | 400,426,015 | |
| -1 | -400,426,015 |
Let's try dividing by 4:
400,426,015 ÷ 4 = 100,106,503.75
If the quotient is a whole number, then 4 and 100,106,503.75 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 | 400,426,015 | |
| -1 | 400,426,015 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 1,093 | 5,465 | 6,661 | 12,023 | 33,305 | 60,115 | 73,271 | 366,355 | 7,280,473 | 36,402,365 | 80,085,203 | 400,426,015 |
| -1 | -5 | -11 | -55 | -1,093 | -5,465 | -6,661 | -12,023 | -33,305 | -60,115 | -73,271 | -366,355 | -7,280,473 | -36,402,365 | -80,085,203 | -400,426,015 |
Here are some more numbers to try:
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