A:
Positive:
1 x 784034655 x 156806937 x 1120049535 x 2240099277 x 2830451385 x 566091939 x 404358087 x 9695
Negative:
-1 x -78403465-5 x -15680693-7 x -11200495-35 x -2240099-277 x -283045-1385 x -56609-1939 x -40435-8087 x -9695
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 78,403,465, 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 | 78,403,465 | |
| -1 | -78,403,465 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 78,403,465.
Example:
1 x 78,403,465 = 78,403,465
and
-1 x -78,403,465 = 78,403,465
Notice both answers equal 78,403,465
With that explanation out of the way, let's continue. Next, we take the number 78,403,465 and divide it by 2:
78,403,465 ÷ 2 = 39,201,732.5
If the quotient is a whole number, then 2 and 39,201,732.5 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 | 78,403,465 | |
| -1 | -78,403,465 |
Now, we try dividing 78,403,465 by 3:
78,403,465 ÷ 3 = 26,134,488.3333
If the quotient is a whole number, then 3 and 26,134,488.3333 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 | 78,403,465 | |
| -1 | -78,403,465 |
Let's try dividing by 4:
78,403,465 ÷ 4 = 19,600,866.25
If the quotient is a whole number, then 4 and 19,600,866.25 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 | 78,403,465 | |
| -1 | 78,403,465 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 277 | 1,385 | 1,939 | 8,087 | 9,695 | 40,435 | 56,609 | 283,045 | 2,240,099 | 11,200,495 | 15,680,693 | 78,403,465 |
| -1 | -5 | -7 | -35 | -277 | -1,385 | -1,939 | -8,087 | -9,695 | -40,435 | -56,609 | -283,045 | -2,240,099 | -11,200,495 | -15,680,693 | -78,403,465 |
Here are some more numbers to try:
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