A:
Positive:
1 x 708728055 x 1417456141 x 1728605205 x 345721227 x 3122151135 x 624431523 x 465357615 x 9307
Negative:
-1 x -70872805-5 x -14174561-41 x -1728605-205 x -345721-227 x -312215-1135 x -62443-1523 x -46535-7615 x -9307
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 70,872,805, 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 | 70,872,805 | |
| -1 | -70,872,805 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 70,872,805.
Example:
1 x 70,872,805 = 70,872,805
and
-1 x -70,872,805 = 70,872,805
Notice both answers equal 70,872,805
With that explanation out of the way, let's continue. Next, we take the number 70,872,805 and divide it by 2:
70,872,805 ÷ 2 = 35,436,402.5
If the quotient is a whole number, then 2 and 35,436,402.5 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 | 70,872,805 | |
| -1 | -70,872,805 |
Now, we try dividing 70,872,805 by 3:
70,872,805 ÷ 3 = 23,624,268.3333
If the quotient is a whole number, then 3 and 23,624,268.3333 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 | 70,872,805 | |
| -1 | -70,872,805 |
Let's try dividing by 4:
70,872,805 ÷ 4 = 17,718,201.25
If the quotient is a whole number, then 4 and 17,718,201.25 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 | 70,872,805 | |
| -1 | 70,872,805 |
If you did it right, you will end up with this table:
| 1 | 5 | 41 | 205 | 227 | 1,135 | 1,523 | 7,615 | 9,307 | 46,535 | 62,443 | 312,215 | 345,721 | 1,728,605 | 14,174,561 | 70,872,805 |
| -1 | -5 | -41 | -205 | -227 | -1,135 | -1,523 | -7,615 | -9,307 | -46,535 | -62,443 | -312,215 | -345,721 | -1,728,605 | -14,174,561 | -70,872,805 |
Here are some more numbers to try:
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