A:
Positive:
1 x 3712080197 x 5302971713 x 2855446391 x 4079209131 x 2833649917 x 4048071703 x 21797311921 x 31139
Negative:
-1 x -371208019-7 x -53029717-13 x -28554463-91 x -4079209-131 x -2833649-917 x -404807-1703 x -217973-11921 x -31139
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 371,208,019, 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 | 371,208,019 | |
| -1 | -371,208,019 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 371,208,019.
Example:
1 x 371,208,019 = 371,208,019
and
-1 x -371,208,019 = 371,208,019
Notice both answers equal 371,208,019
With that explanation out of the way, let's continue. Next, we take the number 371,208,019 and divide it by 2:
371,208,019 ÷ 2 = 185,604,009.5
If the quotient is a whole number, then 2 and 185,604,009.5 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 | 371,208,019 | |
| -1 | -371,208,019 |
Now, we try dividing 371,208,019 by 3:
371,208,019 ÷ 3 = 123,736,006.3333
If the quotient is a whole number, then 3 and 123,736,006.3333 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 | 371,208,019 | |
| -1 | -371,208,019 |
Let's try dividing by 4:
371,208,019 ÷ 4 = 92,802,004.75
If the quotient is a whole number, then 4 and 92,802,004.75 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 | 371,208,019 | |
| -1 | 371,208,019 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 131 | 917 | 1,703 | 11,921 | 31,139 | 217,973 | 404,807 | 2,833,649 | 4,079,209 | 28,554,463 | 53,029,717 | 371,208,019 |
| -1 | -7 | -13 | -91 | -131 | -917 | -1,703 | -11,921 | -31,139 | -217,973 | -404,807 | -2,833,649 | -4,079,209 | -28,554,463 | -53,029,717 | -371,208,019 |
Here are some more numbers to try:
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