A:
Positive:
1 x 2103456655 x 4206913371 x 2962615355 x 592523479 x 4391351237 x 1700452395 x 878276185 x 34009
Negative:
-1 x -210345665-5 x -42069133-71 x -2962615-355 x -592523-479 x -439135-1237 x -170045-2395 x -87827-6185 x -34009
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 210,345,665, 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 | 210,345,665 | |
| -1 | -210,345,665 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 210,345,665.
Example:
1 x 210,345,665 = 210,345,665
and
-1 x -210,345,665 = 210,345,665
Notice both answers equal 210,345,665
With that explanation out of the way, let's continue. Next, we take the number 210,345,665 and divide it by 2:
210,345,665 ÷ 2 = 105,172,832.5
If the quotient is a whole number, then 2 and 105,172,832.5 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 | 210,345,665 | |
| -1 | -210,345,665 |
Now, we try dividing 210,345,665 by 3:
210,345,665 ÷ 3 = 70,115,221.6667
If the quotient is a whole number, then 3 and 70,115,221.6667 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 | 210,345,665 | |
| -1 | -210,345,665 |
Let's try dividing by 4:
210,345,665 ÷ 4 = 52,586,416.25
If the quotient is a whole number, then 4 and 52,586,416.25 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 | 210,345,665 | |
| -1 | 210,345,665 |
If you did it right, you will end up with this table:
| 1 | 5 | 71 | 355 | 479 | 1,237 | 2,395 | 6,185 | 34,009 | 87,827 | 170,045 | 439,135 | 592,523 | 2,962,615 | 42,069,133 | 210,345,665 |
| -1 | -5 | -71 | -355 | -479 | -1,237 | -2,395 | -6,185 | -34,009 | -87,827 | -170,045 | -439,135 | -592,523 | -2,962,615 | -42,069,133 | -210,345,665 |
Here are some more numbers to try:
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