A:
Positive:
1 x 721546255 x 1443092525 x 288618537 x 1950125125 x 577237185 x 390025925 x 780054625 x 15601
Negative:
-1 x -72154625-5 x -14430925-25 x -2886185-37 x -1950125-125 x -577237-185 x -390025-925 x -78005-4625 x -15601
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 72,154,625, 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 | 72,154,625 | |
| -1 | -72,154,625 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 72,154,625.
Example:
1 x 72,154,625 = 72,154,625
and
-1 x -72,154,625 = 72,154,625
Notice both answers equal 72,154,625
With that explanation out of the way, let's continue. Next, we take the number 72,154,625 and divide it by 2:
72,154,625 ÷ 2 = 36,077,312.5
If the quotient is a whole number, then 2 and 36,077,312.5 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 | 72,154,625 | |
| -1 | -72,154,625 |
Now, we try dividing 72,154,625 by 3:
72,154,625 ÷ 3 = 24,051,541.6667
If the quotient is a whole number, then 3 and 24,051,541.6667 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 | 72,154,625 | |
| -1 | -72,154,625 |
Let's try dividing by 4:
72,154,625 ÷ 4 = 18,038,656.25
If the quotient is a whole number, then 4 and 18,038,656.25 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 | 72,154,625 | |
| -1 | 72,154,625 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 37 | 125 | 185 | 925 | 4,625 | 15,601 | 78,005 | 390,025 | 577,237 | 1,950,125 | 2,886,185 | 14,430,925 | 72,154,625 |
| -1 | -5 | -25 | -37 | -125 | -185 | -925 | -4,625 | -15,601 | -78,005 | -390,025 | -577,237 | -1,950,125 | -2,886,185 | -14,430,925 | -72,154,625 |
Here are some more numbers to try:
Try the factor calculator