A:
Positive:
1 x 7197043113 x 553618729 x 2481739349 x 206219377 x 190903547 x 1315734537 x 158637111 x 10121
Negative:
-1 x -71970431-13 x -5536187-29 x -2481739-349 x -206219-377 x -190903-547 x -131573-4537 x -15863-7111 x -10121
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 71,970,431, 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 | 71,970,431 | |
| -1 | -71,970,431 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 71,970,431.
Example:
1 x 71,970,431 = 71,970,431
and
-1 x -71,970,431 = 71,970,431
Notice both answers equal 71,970,431
With that explanation out of the way, let's continue. Next, we take the number 71,970,431 and divide it by 2:
71,970,431 ÷ 2 = 35,985,215.5
If the quotient is a whole number, then 2 and 35,985,215.5 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 | 71,970,431 | |
| -1 | -71,970,431 |
Now, we try dividing 71,970,431 by 3:
71,970,431 ÷ 3 = 23,990,143.6667
If the quotient is a whole number, then 3 and 23,990,143.6667 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 | 71,970,431 | |
| -1 | -71,970,431 |
Let's try dividing by 4:
71,970,431 ÷ 4 = 17,992,607.75
If the quotient is a whole number, then 4 and 17,992,607.75 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 | 71,970,431 | |
| -1 | 71,970,431 |
If you did it right, you will end up with this table:
| 1 | 13 | 29 | 349 | 377 | 547 | 4,537 | 7,111 | 10,121 | 15,863 | 131,573 | 190,903 | 206,219 | 2,481,739 | 5,536,187 | 71,970,431 |
| -1 | -13 | -29 | -349 | -377 | -547 | -4,537 | -7,111 | -10,121 | -15,863 | -131,573 | -190,903 | -206,219 | -2,481,739 | -5,536,187 | -71,970,431 |
Here are some more numbers to try:
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