A:
Positive:
1 x 2874410155 x 5748820317 x 1690829571 x 404846585 x 3381659355 x 8096931207 x 2381456035 x 47629
Negative:
-1 x -287441015-5 x -57488203-17 x -16908295-71 x -4048465-85 x -3381659-355 x -809693-1207 x -238145-6035 x -47629
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 287,441,015, 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 | 287,441,015 | |
| -1 | -287,441,015 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 287,441,015.
Example:
1 x 287,441,015 = 287,441,015
and
-1 x -287,441,015 = 287,441,015
Notice both answers equal 287,441,015
With that explanation out of the way, let's continue. Next, we take the number 287,441,015 and divide it by 2:
287,441,015 ÷ 2 = 143,720,507.5
If the quotient is a whole number, then 2 and 143,720,507.5 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 | 287,441,015 | |
| -1 | -287,441,015 |
Now, we try dividing 287,441,015 by 3:
287,441,015 ÷ 3 = 95,813,671.6667
If the quotient is a whole number, then 3 and 95,813,671.6667 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 | 287,441,015 | |
| -1 | -287,441,015 |
Let's try dividing by 4:
287,441,015 ÷ 4 = 71,860,253.75
If the quotient is a whole number, then 4 and 71,860,253.75 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 | 287,441,015 | |
| -1 | 287,441,015 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 71 | 85 | 355 | 1,207 | 6,035 | 47,629 | 238,145 | 809,693 | 3,381,659 | 4,048,465 | 16,908,295 | 57,488,203 | 287,441,015 |
| -1 | -5 | -17 | -71 | -85 | -355 | -1,207 | -6,035 | -47,629 | -238,145 | -809,693 | -3,381,659 | -4,048,465 | -16,908,295 | -57,488,203 | -287,441,015 |
Here are some more numbers to try:
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