A:
Positive:
1 x 875805497 x 1251150717 x 515179731 x 2825179119 x 735971217 x 403597527 x 1661873689 x 23741
Negative:
-1 x -87580549-7 x -12511507-17 x -5151797-31 x -2825179-119 x -735971-217 x -403597-527 x -166187-3689 x -23741
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 87,580,549, 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 | 87,580,549 | |
| -1 | -87,580,549 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 87,580,549.
Example:
1 x 87,580,549 = 87,580,549
and
-1 x -87,580,549 = 87,580,549
Notice both answers equal 87,580,549
With that explanation out of the way, let's continue. Next, we take the number 87,580,549 and divide it by 2:
87,580,549 ÷ 2 = 43,790,274.5
If the quotient is a whole number, then 2 and 43,790,274.5 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 | 87,580,549 | |
| -1 | -87,580,549 |
Now, we try dividing 87,580,549 by 3:
87,580,549 ÷ 3 = 29,193,516.3333
If the quotient is a whole number, then 3 and 29,193,516.3333 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 | 87,580,549 | |
| -1 | -87,580,549 |
Let's try dividing by 4:
87,580,549 ÷ 4 = 21,895,137.25
If the quotient is a whole number, then 4 and 21,895,137.25 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 | 87,580,549 | |
| -1 | 87,580,549 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 31 | 119 | 217 | 527 | 3,689 | 23,741 | 166,187 | 403,597 | 735,971 | 2,825,179 | 5,151,797 | 12,511,507 | 87,580,549 |
| -1 | -7 | -17 | -31 | -119 | -217 | -527 | -3,689 | -23,741 | -166,187 | -403,597 | -735,971 | -2,825,179 | -5,151,797 | -12,511,507 | -87,580,549 |
Here are some more numbers to try:
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