A:
Positive:
1 x 16186215111 x 1471474117 x 952130367 x 2415853187 x 865573737 x 2196231139 x 14210912529 x 12919
Negative:
-1 x -161862151-11 x -14714741-17 x -9521303-67 x -2415853-187 x -865573-737 x -219623-1139 x -142109-12529 x -12919
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 161,862,151, 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 | 161,862,151 | |
| -1 | -161,862,151 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 161,862,151.
Example:
1 x 161,862,151 = 161,862,151
and
-1 x -161,862,151 = 161,862,151
Notice both answers equal 161,862,151
With that explanation out of the way, let's continue. Next, we take the number 161,862,151 and divide it by 2:
161,862,151 ÷ 2 = 80,931,075.5
If the quotient is a whole number, then 2 and 80,931,075.5 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 | 161,862,151 | |
| -1 | -161,862,151 |
Now, we try dividing 161,862,151 by 3:
161,862,151 ÷ 3 = 53,954,050.3333
If the quotient is a whole number, then 3 and 53,954,050.3333 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 | 161,862,151 | |
| -1 | -161,862,151 |
Let's try dividing by 4:
161,862,151 ÷ 4 = 40,465,537.75
If the quotient is a whole number, then 4 and 40,465,537.75 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 | 161,862,151 | |
| -1 | 161,862,151 |
If you did it right, you will end up with this table:
| 1 | 11 | 17 | 67 | 187 | 737 | 1,139 | 12,529 | 12,919 | 142,109 | 219,623 | 865,573 | 2,415,853 | 9,521,303 | 14,714,741 | 161,862,151 |
| -1 | -11 | -17 | -67 | -187 | -737 | -1,139 | -12,529 | -12,919 | -142,109 | -219,623 | -865,573 | -2,415,853 | -9,521,303 | -14,714,741 | -161,862,151 |
Here are some more numbers to try:
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