A:
Positive:
1 x 40062166111 x 3642015183 x 4826767523 x 766007839 x 477499913 x 4387975753 x 696379229 x 43409
Negative:
-1 x -400621661-11 x -36420151-83 x -4826767-523 x -766007-839 x -477499-913 x -438797-5753 x -69637-9229 x -43409
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 400,621,661, 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 | 400,621,661 | |
| -1 | -400,621,661 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 400,621,661.
Example:
1 x 400,621,661 = 400,621,661
and
-1 x -400,621,661 = 400,621,661
Notice both answers equal 400,621,661
With that explanation out of the way, let's continue. Next, we take the number 400,621,661 and divide it by 2:
400,621,661 ÷ 2 = 200,310,830.5
If the quotient is a whole number, then 2 and 200,310,830.5 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 | 400,621,661 | |
| -1 | -400,621,661 |
Now, we try dividing 400,621,661 by 3:
400,621,661 ÷ 3 = 133,540,553.6667
If the quotient is a whole number, then 3 and 133,540,553.6667 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 | 400,621,661 | |
| -1 | -400,621,661 |
Let's try dividing by 4:
400,621,661 ÷ 4 = 100,155,415.25
If the quotient is a whole number, then 4 and 100,155,415.25 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 | 400,621,661 | |
| -1 | 400,621,661 |
If you did it right, you will end up with this table:
| 1 | 11 | 83 | 523 | 839 | 913 | 5,753 | 9,229 | 43,409 | 69,637 | 438,797 | 477,499 | 766,007 | 4,826,767 | 36,420,151 | 400,621,661 |
| -1 | -11 | -83 | -523 | -839 | -913 | -5,753 | -9,229 | -43,409 | -69,637 | -438,797 | -477,499 | -766,007 | -4,826,767 | -36,420,151 | -400,621,661 |
Here are some more numbers to try:
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