A:
Positive:
1 x 4005214455 x 8010428917 x 2356008585 x 4712017683 x 5864153415 x 1172836899 x 5805511611 x 34495
Negative:
-1 x -400521445-5 x -80104289-17 x -23560085-85 x -4712017-683 x -586415-3415 x -117283-6899 x -58055-11611 x -34495
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 400,521,445, 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 | 400,521,445 | |
| -1 | -400,521,445 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 400,521,445.
Example:
1 x 400,521,445 = 400,521,445
and
-1 x -400,521,445 = 400,521,445
Notice both answers equal 400,521,445
With that explanation out of the way, let's continue. Next, we take the number 400,521,445 and divide it by 2:
400,521,445 ÷ 2 = 200,260,722.5
If the quotient is a whole number, then 2 and 200,260,722.5 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 | 400,521,445 | |
| -1 | -400,521,445 |
Now, we try dividing 400,521,445 by 3:
400,521,445 ÷ 3 = 133,507,148.3333
If the quotient is a whole number, then 3 and 133,507,148.3333 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 | 400,521,445 | |
| -1 | -400,521,445 |
Let's try dividing by 4:
400,521,445 ÷ 4 = 100,130,361.25
If the quotient is a whole number, then 4 and 100,130,361.25 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 | 400,521,445 | |
| -1 | 400,521,445 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 85 | 683 | 3,415 | 6,899 | 11,611 | 34,495 | 58,055 | 117,283 | 586,415 | 4,712,017 | 23,560,085 | 80,104,289 | 400,521,445 |
| -1 | -5 | -17 | -85 | -683 | -3,415 | -6,899 | -11,611 | -34,495 | -58,055 | -117,283 | -586,415 | -4,712,017 | -23,560,085 | -80,104,289 | -400,521,445 |
Here are some more numbers to try:
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