A:
Positive:
1 x 15491652129 x 534194937 x 4186933353 x 438857409 x 3787691073 x 14437710237 x 1513311861 x 13061
Negative:
-1 x -154916521-29 x -5341949-37 x -4186933-353 x -438857-409 x -378769-1073 x -144377-10237 x -15133-11861 x -13061
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 154,916,521, 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 | 154,916,521 | |
| -1 | -154,916,521 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 154,916,521.
Example:
1 x 154,916,521 = 154,916,521
and
-1 x -154,916,521 = 154,916,521
Notice both answers equal 154,916,521
With that explanation out of the way, let's continue. Next, we take the number 154,916,521 and divide it by 2:
154,916,521 ÷ 2 = 77,458,260.5
If the quotient is a whole number, then 2 and 77,458,260.5 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 | 154,916,521 | |
| -1 | -154,916,521 |
Now, we try dividing 154,916,521 by 3:
154,916,521 ÷ 3 = 51,638,840.3333
If the quotient is a whole number, then 3 and 51,638,840.3333 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 | 154,916,521 | |
| -1 | -154,916,521 |
Let's try dividing by 4:
154,916,521 ÷ 4 = 38,729,130.25
If the quotient is a whole number, then 4 and 38,729,130.25 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 | 154,916,521 | |
| -1 | 154,916,521 |
If you did it right, you will end up with this table:
| 1 | 29 | 37 | 353 | 409 | 1,073 | 10,237 | 11,861 | 13,061 | 15,133 | 144,377 | 378,769 | 438,857 | 4,186,933 | 5,341,949 | 154,916,521 |
| -1 | -29 | -37 | -353 | -409 | -1,073 | -10,237 | -11,861 | -13,061 | -15,133 | -144,377 | -378,769 | -438,857 | -4,186,933 | -5,341,949 | -154,916,521 |
Here are some more numbers to try:
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