A:
Positive:
1 x 856422497 x 1223460711 x 778565929 x 295318149 x 174780177 x 1112237203 x 421883319 x 268471539 x 1588911421 x 602692233 x 383535479 x 15631
Negative:
-1 x -85642249-7 x -12234607-11 x -7785659-29 x -2953181-49 x -1747801-77 x -1112237-203 x -421883-319 x -268471-539 x -158891-1421 x -60269-2233 x -38353-5479 x -15631
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 85,642,249, 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 | 85,642,249 | |
| -1 | -85,642,249 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 85,642,249.
Example:
1 x 85,642,249 = 85,642,249
and
-1 x -85,642,249 = 85,642,249
Notice both answers equal 85,642,249
With that explanation out of the way, let's continue. Next, we take the number 85,642,249 and divide it by 2:
85,642,249 ÷ 2 = 42,821,124.5
If the quotient is a whole number, then 2 and 42,821,124.5 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 | 85,642,249 | |
| -1 | -85,642,249 |
Now, we try dividing 85,642,249 by 3:
85,642,249 ÷ 3 = 28,547,416.3333
If the quotient is a whole number, then 3 and 28,547,416.3333 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 | 85,642,249 | |
| -1 | -85,642,249 |
Let's try dividing by 4:
85,642,249 ÷ 4 = 21,410,562.25
If the quotient is a whole number, then 4 and 21,410,562.25 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 | 85,642,249 | |
| -1 | 85,642,249 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 29 | 49 | 77 | 203 | 319 | 539 | 1,421 | 2,233 | 5,479 | 15,631 | 38,353 | 60,269 | 158,891 | 268,471 | 421,883 | 1,112,237 | 1,747,801 | 2,953,181 | 7,785,659 | 12,234,607 | 85,642,249 |
| -1 | -7 | -11 | -29 | -49 | -77 | -203 | -319 | -539 | -1,421 | -2,233 | -5,479 | -15,631 | -38,353 | -60,269 | -158,891 | -268,471 | -421,883 | -1,112,237 | -1,747,801 | -2,953,181 | -7,785,659 | -12,234,607 | -85,642,249 |
Here are some more numbers to try:
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