A:
Positive:
1 x 2116561517 x 3023659389 x 2378159181 x 1169371623 x 3397371267 x 1670531877 x 11276313139 x 16109
Negative:
-1 x -211656151-7 x -30236593-89 x -2378159-181 x -1169371-623 x -339737-1267 x -167053-1877 x -112763-13139 x -16109
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 211,656,151, 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 | 211,656,151 | |
| -1 | -211,656,151 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 211,656,151.
Example:
1 x 211,656,151 = 211,656,151
and
-1 x -211,656,151 = 211,656,151
Notice both answers equal 211,656,151
With that explanation out of the way, let's continue. Next, we take the number 211,656,151 and divide it by 2:
211,656,151 ÷ 2 = 105,828,075.5
If the quotient is a whole number, then 2 and 105,828,075.5 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 | 211,656,151 | |
| -1 | -211,656,151 |
Now, we try dividing 211,656,151 by 3:
211,656,151 ÷ 3 = 70,552,050.3333
If the quotient is a whole number, then 3 and 70,552,050.3333 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 | 211,656,151 | |
| -1 | -211,656,151 |
Let's try dividing by 4:
211,656,151 ÷ 4 = 52,914,037.75
If the quotient is a whole number, then 4 and 52,914,037.75 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 | 211,656,151 | |
| -1 | 211,656,151 |
If you did it right, you will end up with this table:
| 1 | 7 | 89 | 181 | 623 | 1,267 | 1,877 | 13,139 | 16,109 | 112,763 | 167,053 | 339,737 | 1,169,371 | 2,378,159 | 30,236,593 | 211,656,151 |
| -1 | -7 | -89 | -181 | -623 | -1,267 | -1,877 | -13,139 | -16,109 | -112,763 | -167,053 | -339,737 | -1,169,371 | -2,378,159 | -30,236,593 | -211,656,151 |
Here are some more numbers to try:
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