A:
Positive:
1 x 2155224197 x 30788917139 x 1550521359 x 600341617 x 349307973 x 2215032513 x 857634319 x 49901
Negative:
-1 x -215522419-7 x -30788917-139 x -1550521-359 x -600341-617 x -349307-973 x -221503-2513 x -85763-4319 x -49901
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 215,522,419, 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 | 215,522,419 | |
| -1 | -215,522,419 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 215,522,419.
Example:
1 x 215,522,419 = 215,522,419
and
-1 x -215,522,419 = 215,522,419
Notice both answers equal 215,522,419
With that explanation out of the way, let's continue. Next, we take the number 215,522,419 and divide it by 2:
215,522,419 ÷ 2 = 107,761,209.5
If the quotient is a whole number, then 2 and 107,761,209.5 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 | 215,522,419 | |
| -1 | -215,522,419 |
Now, we try dividing 215,522,419 by 3:
215,522,419 ÷ 3 = 71,840,806.3333
If the quotient is a whole number, then 3 and 71,840,806.3333 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 | 215,522,419 | |
| -1 | -215,522,419 |
Let's try dividing by 4:
215,522,419 ÷ 4 = 53,880,604.75
If the quotient is a whole number, then 4 and 53,880,604.75 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 | 215,522,419 | |
| -1 | 215,522,419 |
If you did it right, you will end up with this table:
| 1 | 7 | 139 | 359 | 617 | 973 | 2,513 | 4,319 | 49,901 | 85,763 | 221,503 | 349,307 | 600,341 | 1,550,521 | 30,788,917 | 215,522,419 |
| -1 | -7 | -139 | -359 | -617 | -973 | -2,513 | -4,319 | -49,901 | -85,763 | -221,503 | -349,307 | -600,341 | -1,550,521 | -30,788,917 | -215,522,419 |
Here are some more numbers to try:
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