A:
Positive:
1 x 875755517 x 1251079317 x 5151503119 x 735929373 x 2347871973 x 443872611 x 335416341 x 13811
Negative:
-1 x -87575551-7 x -12510793-17 x -5151503-119 x -735929-373 x -234787-1973 x -44387-2611 x -33541-6341 x -13811
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 87,575,551, 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 | 87,575,551 | |
| -1 | -87,575,551 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 87,575,551.
Example:
1 x 87,575,551 = 87,575,551
and
-1 x -87,575,551 = 87,575,551
Notice both answers equal 87,575,551
With that explanation out of the way, let's continue. Next, we take the number 87,575,551 and divide it by 2:
87,575,551 ÷ 2 = 43,787,775.5
If the quotient is a whole number, then 2 and 43,787,775.5 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 | 87,575,551 | |
| -1 | -87,575,551 |
Now, we try dividing 87,575,551 by 3:
87,575,551 ÷ 3 = 29,191,850.3333
If the quotient is a whole number, then 3 and 29,191,850.3333 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 | 87,575,551 | |
| -1 | -87,575,551 |
Let's try dividing by 4:
87,575,551 ÷ 4 = 21,893,887.75
If the quotient is a whole number, then 4 and 21,893,887.75 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 | 87,575,551 | |
| -1 | 87,575,551 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 119 | 373 | 1,973 | 2,611 | 6,341 | 13,811 | 33,541 | 44,387 | 234,787 | 735,929 | 5,151,503 | 12,510,793 | 87,575,551 |
| -1 | -7 | -17 | -119 | -373 | -1,973 | -2,611 | -6,341 | -13,811 | -33,541 | -44,387 | -234,787 | -735,929 | -5,151,503 | -12,510,793 | -87,575,551 |
Here are some more numbers to try:
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