A:
Positive:
1 x 780037855 x 1560075747 x 165965573 x 1068545235 x 331931365 x 2137093431 x 227354547 x 17155
Negative:
-1 x -78003785-5 x -15600757-47 x -1659655-73 x -1068545-235 x -331931-365 x -213709-3431 x -22735-4547 x -17155
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 78,003,785, 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 | 78,003,785 | |
| -1 | -78,003,785 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 78,003,785.
Example:
1 x 78,003,785 = 78,003,785
and
-1 x -78,003,785 = 78,003,785
Notice both answers equal 78,003,785
With that explanation out of the way, let's continue. Next, we take the number 78,003,785 and divide it by 2:
78,003,785 ÷ 2 = 39,001,892.5
If the quotient is a whole number, then 2 and 39,001,892.5 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 | 78,003,785 | |
| -1 | -78,003,785 |
Now, we try dividing 78,003,785 by 3:
78,003,785 ÷ 3 = 26,001,261.6667
If the quotient is a whole number, then 3 and 26,001,261.6667 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 | 78,003,785 | |
| -1 | -78,003,785 |
Let's try dividing by 4:
78,003,785 ÷ 4 = 19,500,946.25
If the quotient is a whole number, then 4 and 19,500,946.25 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 | 78,003,785 | |
| -1 | 78,003,785 |
If you did it right, you will end up with this table:
| 1 | 5 | 47 | 73 | 235 | 365 | 3,431 | 4,547 | 17,155 | 22,735 | 213,709 | 331,931 | 1,068,545 | 1,659,655 | 15,600,757 | 78,003,785 |
| -1 | -5 | -47 | -73 | -235 | -365 | -3,431 | -4,547 | -17,155 | -22,735 | -213,709 | -331,931 | -1,068,545 | -1,659,655 | -15,600,757 | -78,003,785 |
Here are some more numbers to try:
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