A:
Positive:
1 x 787164355 x 157432877 x 1124520535 x 2249041449 x 1753152245 x 350633143 x 250455009 x 15715
Negative:
-1 x -78716435-5 x -15743287-7 x -11245205-35 x -2249041-449 x -175315-2245 x -35063-3143 x -25045-5009 x -15715
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 78,716,435, 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 | 78,716,435 | |
| -1 | -78,716,435 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 78,716,435.
Example:
1 x 78,716,435 = 78,716,435
and
-1 x -78,716,435 = 78,716,435
Notice both answers equal 78,716,435
With that explanation out of the way, let's continue. Next, we take the number 78,716,435 and divide it by 2:
78,716,435 ÷ 2 = 39,358,217.5
If the quotient is a whole number, then 2 and 39,358,217.5 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 | 78,716,435 | |
| -1 | -78,716,435 |
Now, we try dividing 78,716,435 by 3:
78,716,435 ÷ 3 = 26,238,811.6667
If the quotient is a whole number, then 3 and 26,238,811.6667 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 | 78,716,435 | |
| -1 | -78,716,435 |
Let's try dividing by 4:
78,716,435 ÷ 4 = 19,679,108.75
If the quotient is a whole number, then 4 and 19,679,108.75 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 | 78,716,435 | |
| -1 | 78,716,435 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 449 | 2,245 | 3,143 | 5,009 | 15,715 | 25,045 | 35,063 | 175,315 | 2,249,041 | 11,245,205 | 15,743,287 | 78,716,435 |
| -1 | -5 | -7 | -35 | -449 | -2,245 | -3,143 | -5,009 | -15,715 | -25,045 | -35,063 | -175,315 | -2,249,041 | -11,245,205 | -15,743,287 | -78,716,435 |
Here are some more numbers to try:
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