A:
Positive:
1 x 6538888931 x 210931961 x 1071949151 x 433039229 x 2855411891 x 345794681 x 139697099 x 9211
Negative:
-1 x -65388889-31 x -2109319-61 x -1071949-151 x -433039-229 x -285541-1891 x -34579-4681 x -13969-7099 x -9211
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 65,388,889, 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 | 65,388,889 | |
| -1 | -65,388,889 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 65,388,889.
Example:
1 x 65,388,889 = 65,388,889
and
-1 x -65,388,889 = 65,388,889
Notice both answers equal 65,388,889
With that explanation out of the way, let's continue. Next, we take the number 65,388,889 and divide it by 2:
65,388,889 ÷ 2 = 32,694,444.5
If the quotient is a whole number, then 2 and 32,694,444.5 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 | 65,388,889 | |
| -1 | -65,388,889 |
Now, we try dividing 65,388,889 by 3:
65,388,889 ÷ 3 = 21,796,296.3333
If the quotient is a whole number, then 3 and 21,796,296.3333 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 | 65,388,889 | |
| -1 | -65,388,889 |
Let's try dividing by 4:
65,388,889 ÷ 4 = 16,347,222.25
If the quotient is a whole number, then 4 and 16,347,222.25 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 | 65,388,889 | |
| -1 | 65,388,889 |
If you did it right, you will end up with this table:
| 1 | 31 | 61 | 151 | 229 | 1,891 | 4,681 | 7,099 | 9,211 | 13,969 | 34,579 | 285,541 | 433,039 | 1,071,949 | 2,109,319 | 65,388,889 |
| -1 | -31 | -61 | -151 | -229 | -1,891 | -4,681 | -7,099 | -9,211 | -13,969 | -34,579 | -285,541 | -433,039 | -1,071,949 | -2,109,319 | -65,388,889 |
Here are some more numbers to try:
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