A:
Positive:
1 x 19651455 x 3930297 x 28073513 x 15116535 x 5614749 x 4010565 x 3023391 x 21595245 x 8021455 x 4319617 x 3185637 x 3085
Negative:
-1 x -1965145-5 x -393029-7 x -280735-13 x -151165-35 x -56147-49 x -40105-65 x -30233-91 x -21595-245 x -8021-455 x -4319-617 x -3185-637 x -3085
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 1,965,145, 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 | 1,965,145 | |
| -1 | -1,965,145 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,965,145.
Example:
1 x 1,965,145 = 1,965,145
and
-1 x -1,965,145 = 1,965,145
Notice both answers equal 1,965,145
With that explanation out of the way, let's continue. Next, we take the number 1,965,145 and divide it by 2:
1,965,145 ÷ 2 = 982,572.5
If the quotient is a whole number, then 2 and 982,572.5 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 | 1,965,145 | |
| -1 | -1,965,145 |
Now, we try dividing 1,965,145 by 3:
1,965,145 ÷ 3 = 655,048.3333
If the quotient is a whole number, then 3 and 655,048.3333 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 | 1,965,145 | |
| -1 | -1,965,145 |
Let's try dividing by 4:
1,965,145 ÷ 4 = 491,286.25
If the quotient is a whole number, then 4 and 491,286.25 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 | 1,965,145 | |
| -1 | 1,965,145 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 13 | 35 | 49 | 65 | 91 | 245 | 455 | 617 | 637 | 3,085 | 3,185 | 4,319 | 8,021 | 21,595 | 30,233 | 40,105 | 56,147 | 151,165 | 280,735 | 393,029 | 1,965,145 |
| -1 | -5 | -7 | -13 | -35 | -49 | -65 | -91 | -245 | -455 | -617 | -637 | -3,085 | -3,185 | -4,319 | -8,021 | -21,595 | -30,233 | -40,105 | -56,147 | -151,165 | -280,735 | -393,029 | -1,965,145 |
Here are some more numbers to try:
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