A:
Positive:
1 x 1879518417 x 2685026311 x 1708653177 x 2440933121 x 1553321847 x 2219031331 x 1412119317 x 20173
Negative:
-1 x -187951841-7 x -26850263-11 x -17086531-77 x -2440933-121 x -1553321-847 x -221903-1331 x -141211-9317 x -20173
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 187,951,841, 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 | 187,951,841 | |
| -1 | -187,951,841 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 187,951,841.
Example:
1 x 187,951,841 = 187,951,841
and
-1 x -187,951,841 = 187,951,841
Notice both answers equal 187,951,841
With that explanation out of the way, let's continue. Next, we take the number 187,951,841 and divide it by 2:
187,951,841 ÷ 2 = 93,975,920.5
If the quotient is a whole number, then 2 and 93,975,920.5 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 | 187,951,841 | |
| -1 | -187,951,841 |
Now, we try dividing 187,951,841 by 3:
187,951,841 ÷ 3 = 62,650,613.6667
If the quotient is a whole number, then 3 and 62,650,613.6667 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 | 187,951,841 | |
| -1 | -187,951,841 |
Let's try dividing by 4:
187,951,841 ÷ 4 = 46,987,960.25
If the quotient is a whole number, then 4 and 46,987,960.25 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 | 187,951,841 | |
| -1 | 187,951,841 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 121 | 847 | 1,331 | 9,317 | 20,173 | 141,211 | 221,903 | 1,553,321 | 2,440,933 | 17,086,531 | 26,850,263 | 187,951,841 |
| -1 | -7 | -11 | -77 | -121 | -847 | -1,331 | -9,317 | -20,173 | -141,211 | -221,903 | -1,553,321 | -2,440,933 | -17,086,531 | -26,850,263 | -187,951,841 |
Here are some more numbers to try:
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