A:
Positive:
1 x 785572977 x 1122247113 x 604286991 x 863267151 x 5202471057 x 743211963 x 400195717 x 13741
Negative:
-1 x -78557297-7 x -11222471-13 x -6042869-91 x -863267-151 x -520247-1057 x -74321-1963 x -40019-5717 x -13741
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 78,557,297, 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 | 78,557,297 | |
| -1 | -78,557,297 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 78,557,297.
Example:
1 x 78,557,297 = 78,557,297
and
-1 x -78,557,297 = 78,557,297
Notice both answers equal 78,557,297
With that explanation out of the way, let's continue. Next, we take the number 78,557,297 and divide it by 2:
78,557,297 ÷ 2 = 39,278,648.5
If the quotient is a whole number, then 2 and 39,278,648.5 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 | 78,557,297 | |
| -1 | -78,557,297 |
Now, we try dividing 78,557,297 by 3:
78,557,297 ÷ 3 = 26,185,765.6667
If the quotient is a whole number, then 3 and 26,185,765.6667 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 | 78,557,297 | |
| -1 | -78,557,297 |
Let's try dividing by 4:
78,557,297 ÷ 4 = 19,639,324.25
If the quotient is a whole number, then 4 and 19,639,324.25 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 | 78,557,297 | |
| -1 | 78,557,297 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 151 | 1,057 | 1,963 | 5,717 | 13,741 | 40,019 | 74,321 | 520,247 | 863,267 | 6,042,869 | 11,222,471 | 78,557,297 |
| -1 | -7 | -13 | -91 | -151 | -1,057 | -1,963 | -5,717 | -13,741 | -40,019 | -74,321 | -520,247 | -863,267 | -6,042,869 | -11,222,471 | -78,557,297 |
Here are some more numbers to try:
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