A:
Positive:
1 x 1615536355 x 3231072717 x 950315529 x 557081585 x 1900631145 x 1114163493 x 3276952465 x 65539
Negative:
-1 x -161553635-5 x -32310727-17 x -9503155-29 x -5570815-85 x -1900631-145 x -1114163-493 x -327695-2465 x -65539
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 161,553,635, 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 | 161,553,635 | |
| -1 | -161,553,635 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 161,553,635.
Example:
1 x 161,553,635 = 161,553,635
and
-1 x -161,553,635 = 161,553,635
Notice both answers equal 161,553,635
With that explanation out of the way, let's continue. Next, we take the number 161,553,635 and divide it by 2:
161,553,635 ÷ 2 = 80,776,817.5
If the quotient is a whole number, then 2 and 80,776,817.5 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 | 161,553,635 | |
| -1 | -161,553,635 |
Now, we try dividing 161,553,635 by 3:
161,553,635 ÷ 3 = 53,851,211.6667
If the quotient is a whole number, then 3 and 53,851,211.6667 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 | 161,553,635 | |
| -1 | -161,553,635 |
Let's try dividing by 4:
161,553,635 ÷ 4 = 40,388,408.75
If the quotient is a whole number, then 4 and 40,388,408.75 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 | 161,553,635 | |
| -1 | 161,553,635 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 29 | 85 | 145 | 493 | 2,465 | 65,539 | 327,695 | 1,114,163 | 1,900,631 | 5,570,815 | 9,503,155 | 32,310,727 | 161,553,635 |
| -1 | -5 | -17 | -29 | -85 | -145 | -493 | -2,465 | -65,539 | -327,695 | -1,114,163 | -1,900,631 | -5,570,815 | -9,503,155 | -32,310,727 | -161,553,635 |
Here are some more numbers to try:
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