A:
Positive:
1 x 780005455 x 156001097 x 1114293535 x 2228587139 x 561155695 x 112231973 x 801654865 x 16033
Negative:
-1 x -78000545-5 x -15600109-7 x -11142935-35 x -2228587-139 x -561155-695 x -112231-973 x -80165-4865 x -16033
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 78,000,545, 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 | 78,000,545 | |
| -1 | -78,000,545 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 78,000,545.
Example:
1 x 78,000,545 = 78,000,545
and
-1 x -78,000,545 = 78,000,545
Notice both answers equal 78,000,545
With that explanation out of the way, let's continue. Next, we take the number 78,000,545 and divide it by 2:
78,000,545 ÷ 2 = 39,000,272.5
If the quotient is a whole number, then 2 and 39,000,272.5 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 | 78,000,545 | |
| -1 | -78,000,545 |
Now, we try dividing 78,000,545 by 3:
78,000,545 ÷ 3 = 26,000,181.6667
If the quotient is a whole number, then 3 and 26,000,181.6667 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 | 78,000,545 | |
| -1 | -78,000,545 |
Let's try dividing by 4:
78,000,545 ÷ 4 = 19,500,136.25
If the quotient is a whole number, then 4 and 19,500,136.25 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 | 78,000,545 | |
| -1 | 78,000,545 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 139 | 695 | 973 | 4,865 | 16,033 | 80,165 | 112,231 | 561,155 | 2,228,587 | 11,142,935 | 15,600,109 | 78,000,545 |
| -1 | -5 | -7 | -35 | -139 | -695 | -973 | -4,865 | -16,033 | -80,165 | -112,231 | -561,155 | -2,228,587 | -11,142,935 | -15,600,109 | -78,000,545 |
Here are some more numbers to try:
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