A:
Positive:
1 x 21625404731 x 697593779 x 2737393227 x 952661389 x 5559232449 x 883037037 x 3073112059 x 17933
Negative:
-1 x -216254047-31 x -6975937-79 x -2737393-227 x -952661-389 x -555923-2449 x -88303-7037 x -30731-12059 x -17933
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 216,254,047, 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 | 216,254,047 | |
| -1 | -216,254,047 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 216,254,047.
Example:
1 x 216,254,047 = 216,254,047
and
-1 x -216,254,047 = 216,254,047
Notice both answers equal 216,254,047
With that explanation out of the way, let's continue. Next, we take the number 216,254,047 and divide it by 2:
216,254,047 ÷ 2 = 108,127,023.5
If the quotient is a whole number, then 2 and 108,127,023.5 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 | 216,254,047 | |
| -1 | -216,254,047 |
Now, we try dividing 216,254,047 by 3:
216,254,047 ÷ 3 = 72,084,682.3333
If the quotient is a whole number, then 3 and 72,084,682.3333 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 | 216,254,047 | |
| -1 | -216,254,047 |
Let's try dividing by 4:
216,254,047 ÷ 4 = 54,063,511.75
If the quotient is a whole number, then 4 and 54,063,511.75 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 | 216,254,047 | |
| -1 | 216,254,047 |
If you did it right, you will end up with this table:
| 1 | 31 | 79 | 227 | 389 | 2,449 | 7,037 | 12,059 | 17,933 | 30,731 | 88,303 | 555,923 | 952,661 | 2,737,393 | 6,975,937 | 216,254,047 |
| -1 | -31 | -79 | -227 | -389 | -2,449 | -7,037 | -12,059 | -17,933 | -30,731 | -88,303 | -555,923 | -952,661 | -2,737,393 | -6,975,937 | -216,254,047 |
Here are some more numbers to try:
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