A:
Positive:
1 x 15542130743 x 361444967 x 231972173 x 2129059739 x 2103132881 x 539473139 x 495134891 x 31777
Negative:
-1 x -155421307-43 x -3614449-67 x -2319721-73 x -2129059-739 x -210313-2881 x -53947-3139 x -49513-4891 x -31777
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 155,421,307, 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 | 155,421,307 | |
| -1 | -155,421,307 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 155,421,307.
Example:
1 x 155,421,307 = 155,421,307
and
-1 x -155,421,307 = 155,421,307
Notice both answers equal 155,421,307
With that explanation out of the way, let's continue. Next, we take the number 155,421,307 and divide it by 2:
155,421,307 ÷ 2 = 77,710,653.5
If the quotient is a whole number, then 2 and 77,710,653.5 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 | 155,421,307 | |
| -1 | -155,421,307 |
Now, we try dividing 155,421,307 by 3:
155,421,307 ÷ 3 = 51,807,102.3333
If the quotient is a whole number, then 3 and 51,807,102.3333 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 | 155,421,307 | |
| -1 | -155,421,307 |
Let's try dividing by 4:
155,421,307 ÷ 4 = 38,855,326.75
If the quotient is a whole number, then 4 and 38,855,326.75 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 | 155,421,307 | |
| -1 | 155,421,307 |
If you did it right, you will end up with this table:
| 1 | 43 | 67 | 73 | 739 | 2,881 | 3,139 | 4,891 | 31,777 | 49,513 | 53,947 | 210,313 | 2,129,059 | 2,319,721 | 3,614,449 | 155,421,307 |
| -1 | -43 | -67 | -73 | -739 | -2,881 | -3,139 | -4,891 | -31,777 | -49,513 | -53,947 | -210,313 | -2,129,059 | -2,319,721 | -3,614,449 | -155,421,307 |
Here are some more numbers to try:
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