A:
Positive:
1 x 71533917 x 102191323 x 311017157 x 45563161 x 44431283 x 252771099 x 65091981 x 3611
Negative:
-1 x -7153391-7 x -1021913-23 x -311017-157 x -45563-161 x -44431-283 x -25277-1099 x -6509-1981 x -3611
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 7,153,391, 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 | 7,153,391 | |
| -1 | -7,153,391 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,153,391.
Example:
1 x 7,153,391 = 7,153,391
and
-1 x -7,153,391 = 7,153,391
Notice both answers equal 7,153,391
With that explanation out of the way, let's continue. Next, we take the number 7,153,391 and divide it by 2:
7,153,391 ÷ 2 = 3,576,695.5
If the quotient is a whole number, then 2 and 3,576,695.5 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 | 7,153,391 | |
| -1 | -7,153,391 |
Now, we try dividing 7,153,391 by 3:
7,153,391 ÷ 3 = 2,384,463.6667
If the quotient is a whole number, then 3 and 2,384,463.6667 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 | 7,153,391 | |
| -1 | -7,153,391 |
Let's try dividing by 4:
7,153,391 ÷ 4 = 1,788,347.75
If the quotient is a whole number, then 4 and 1,788,347.75 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 | 7,153,391 | |
| -1 | 7,153,391 |
If you did it right, you will end up with this table:
| 1 | 7 | 23 | 157 | 161 | 283 | 1,099 | 1,981 | 3,611 | 6,509 | 25,277 | 44,431 | 45,563 | 311,017 | 1,021,913 | 7,153,391 |
| -1 | -7 | -23 | -157 | -161 | -283 | -1,099 | -1,981 | -3,611 | -6,509 | -25,277 | -44,431 | -45,563 | -311,017 | -1,021,913 | -7,153,391 |
Here are some more numbers to try:
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