A:
Positive:
1 x 636874855 x 1273749731 x 2054435155 x 410887251 x 2537351255 x 507471637 x 389057781 x 8185
Negative:
-1 x -63687485-5 x -12737497-31 x -2054435-155 x -410887-251 x -253735-1255 x -50747-1637 x -38905-7781 x -8185
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 63,687,485, 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 | 63,687,485 | |
| -1 | -63,687,485 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 63,687,485.
Example:
1 x 63,687,485 = 63,687,485
and
-1 x -63,687,485 = 63,687,485
Notice both answers equal 63,687,485
With that explanation out of the way, let's continue. Next, we take the number 63,687,485 and divide it by 2:
63,687,485 ÷ 2 = 31,843,742.5
If the quotient is a whole number, then 2 and 31,843,742.5 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 | 63,687,485 | |
| -1 | -63,687,485 |
Now, we try dividing 63,687,485 by 3:
63,687,485 ÷ 3 = 21,229,161.6667
If the quotient is a whole number, then 3 and 21,229,161.6667 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 | 63,687,485 | |
| -1 | -63,687,485 |
Let's try dividing by 4:
63,687,485 ÷ 4 = 15,921,871.25
If the quotient is a whole number, then 4 and 15,921,871.25 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 | 63,687,485 | |
| -1 | 63,687,485 |
If you did it right, you will end up with this table:
| 1 | 5 | 31 | 155 | 251 | 1,255 | 1,637 | 7,781 | 8,185 | 38,905 | 50,747 | 253,735 | 410,887 | 2,054,435 | 12,737,497 | 63,687,485 |
| -1 | -5 | -31 | -155 | -251 | -1,255 | -1,637 | -7,781 | -8,185 | -38,905 | -50,747 | -253,735 | -410,887 | -2,054,435 | -12,737,497 | -63,687,485 |
Here are some more numbers to try:
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