A:
Positive:
1 x 153421455 x 30684297 x 219173513 x 118016535 x 43834749 x 31310565 x 23603391 x 168595245 x 62621455 x 33719637 x 240853185 x 4817
Negative:
-1 x -15342145-5 x -3068429-7 x -2191735-13 x -1180165-35 x -438347-49 x -313105-65 x -236033-91 x -168595-245 x -62621-455 x -33719-637 x -24085-3185 x -4817
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 15,342,145, 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 | 15,342,145 | |
| -1 | -15,342,145 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,342,145.
Example:
1 x 15,342,145 = 15,342,145
and
-1 x -15,342,145 = 15,342,145
Notice both answers equal 15,342,145
With that explanation out of the way, let's continue. Next, we take the number 15,342,145 and divide it by 2:
15,342,145 ÷ 2 = 7,671,072.5
If the quotient is a whole number, then 2 and 7,671,072.5 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 | 15,342,145 | |
| -1 | -15,342,145 |
Now, we try dividing 15,342,145 by 3:
15,342,145 ÷ 3 = 5,114,048.3333
If the quotient is a whole number, then 3 and 5,114,048.3333 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 | 15,342,145 | |
| -1 | -15,342,145 |
Let's try dividing by 4:
15,342,145 ÷ 4 = 3,835,536.25
If the quotient is a whole number, then 4 and 3,835,536.25 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 | 15,342,145 | |
| -1 | 15,342,145 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 13 | 35 | 49 | 65 | 91 | 245 | 455 | 637 | 3,185 | 4,817 | 24,085 | 33,719 | 62,621 | 168,595 | 236,033 | 313,105 | 438,347 | 1,180,165 | 2,191,735 | 3,068,429 | 15,342,145 |
| -1 | -5 | -7 | -13 | -35 | -49 | -65 | -91 | -245 | -455 | -637 | -3,185 | -4,817 | -24,085 | -33,719 | -62,621 | -168,595 | -236,033 | -313,105 | -438,347 | -1,180,165 | -2,191,735 | -3,068,429 | -15,342,145 |
Here are some more numbers to try:
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