A:
Positive:
1 x 2135430437 x 3050614947 x 4543469329 x 649067433 x 4931711499 x 1424573031 x 7045310493 x 20351
Negative:
-1 x -213543043-7 x -30506149-47 x -4543469-329 x -649067-433 x -493171-1499 x -142457-3031 x -70453-10493 x -20351
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 213,543,043, 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 | 213,543,043 | |
| -1 | -213,543,043 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 213,543,043.
Example:
1 x 213,543,043 = 213,543,043
and
-1 x -213,543,043 = 213,543,043
Notice both answers equal 213,543,043
With that explanation out of the way, let's continue. Next, we take the number 213,543,043 and divide it by 2:
213,543,043 ÷ 2 = 106,771,521.5
If the quotient is a whole number, then 2 and 106,771,521.5 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 | 213,543,043 | |
| -1 | -213,543,043 |
Now, we try dividing 213,543,043 by 3:
213,543,043 ÷ 3 = 71,181,014.3333
If the quotient is a whole number, then 3 and 71,181,014.3333 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 | 213,543,043 | |
| -1 | -213,543,043 |
Let's try dividing by 4:
213,543,043 ÷ 4 = 53,385,760.75
If the quotient is a whole number, then 4 and 53,385,760.75 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 | 213,543,043 | |
| -1 | 213,543,043 |
If you did it right, you will end up with this table:
| 1 | 7 | 47 | 329 | 433 | 1,499 | 3,031 | 10,493 | 20,351 | 70,453 | 142,457 | 493,171 | 649,067 | 4,543,469 | 30,506,149 | 213,543,043 |
| -1 | -7 | -47 | -329 | -433 | -1,499 | -3,031 | -10,493 | -20,351 | -70,453 | -142,457 | -493,171 | -649,067 | -4,543,469 | -30,506,149 | -213,543,043 |
Here are some more numbers to try:
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