A:
Positive:
1 x 70388155 x 14077637 x 100554535 x 20110983 x 84805415 x 16961581 x 121152423 x 2905
Negative:
-1 x -7038815-5 x -1407763-7 x -1005545-35 x -201109-83 x -84805-415 x -16961-581 x -12115-2423 x -2905
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 7,038,815, 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 | 7,038,815 | |
| -1 | -7,038,815 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,038,815.
Example:
1 x 7,038,815 = 7,038,815
and
-1 x -7,038,815 = 7,038,815
Notice both answers equal 7,038,815
With that explanation out of the way, let's continue. Next, we take the number 7,038,815 and divide it by 2:
7,038,815 ÷ 2 = 3,519,407.5
If the quotient is a whole number, then 2 and 3,519,407.5 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 | 7,038,815 | |
| -1 | -7,038,815 |
Now, we try dividing 7,038,815 by 3:
7,038,815 ÷ 3 = 2,346,271.6667
If the quotient is a whole number, then 3 and 2,346,271.6667 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 | 7,038,815 | |
| -1 | -7,038,815 |
Let's try dividing by 4:
7,038,815 ÷ 4 = 1,759,703.75
If the quotient is a whole number, then 4 and 1,759,703.75 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 | 7,038,815 | |
| -1 | 7,038,815 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 83 | 415 | 581 | 2,423 | 2,905 | 12,115 | 16,961 | 84,805 | 201,109 | 1,005,545 | 1,407,763 | 7,038,815 |
| -1 | -5 | -7 | -35 | -83 | -415 | -581 | -2,423 | -2,905 | -12,115 | -16,961 | -84,805 | -201,109 | -1,005,545 | -1,407,763 | -7,038,815 |
Here are some more numbers to try:
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