To find all the divisors of the number 230,769:
- 1. Decompose the number into prime factors.
- See how you can find out how many factors (divisors) the number has, without actually calculating them.
- 2. Multiply the prime factors in all their unique combinations, that yield different results.
1. Carry out the prime factorization of the number 230,769:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
230,769 = 34 × 7 × 11 × 37
230,769 is not a prime number but a composite one.
- Prime number: a natural number that is divisible (divided evenly) only by 1 and itself. A prime number has exactly two factors: 1 and the number itself.
- Examples of prime numbers: 2 (factors 1, 2), 3 (factors 1, 3), 5 (factors 1, 5), 7 (factors 1, 7), 11 (factors 1, 11), 13 (factors 1, 13), ...
- Composite number: a natural number that has at least one factor other than 1 and itself. So it is neither a prime number nor 1.
- Examples of composite numbers: 4 (it has 3 factors: 1, 2, 4), 6 (it has 4 factors: 1, 2, 3, 6), 8 (it has 4 factors: 1, 2, 4, 8), 9 (it has 3 factors: 1, 3, 9), 10 (it has 4 factors: 1, 2, 5, 10), 12 (it has 6 factors: 1, 2, 3, 4, 6, 12), ...
How to count the number of factors of a number?
Without actually finding the factors
- If a number N is prime factorized as:
N = am × bk × cz
where a, b, c are the prime factors and m, k, z are their exponents, natural numbers, .... - ...
- Then the number of factors of the number N can be calculated as:
n = (m + 1) × (k + 1) × (z + 1) - ...
- In our case, the number of factors is calculated as:
- n = (4 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 5 × 2 × 2 × 2 = 40
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 230,769
- Multiply the prime factors involved in the prime factorization of the number in all their unique combinations, that give different results.
- Also consider the exponents of these prime factors.
- Also add 1 to the list of factors (divisors). All the numbers are divisible by 1.
All the factors (divisors) are listed below - in ascending order
The list of factors (divisors):
Numbers other than 1 that are not prime factors are composite factors (divisors).
neither prime nor composite =
1
prime factor =
3
prime factor =
7
composite factor = 3
2 =
9
prime factor =
11
composite factor = 3 × 7 =
21
composite factor = 3
3 =
27
composite factor = 3 × 11 =
33
prime factor =
37
composite factor = 3
2 × 7 =
63
composite factor = 7 × 11 =
77
composite factor = 3
4 =
81
composite factor = 3
2 × 11 =
99
composite factor = 3 × 37 =
111
composite factor = 3
3 × 7 =
189
composite factor = 3 × 7 × 11 =
231
composite factor = 7 × 37 =
259
composite factor = 3
3 × 11 =
297
composite factor = 3
2 × 37 =
333
composite factor = 11 × 37 =
407
This list continues below...
... This list continues from above
composite factor = 3
4 × 7 =
567
composite factor = 3
2 × 7 × 11 =
693
composite factor = 3 × 7 × 37 =
777
composite factor = 3
4 × 11 =
891
composite factor = 3
3 × 37 =
999
composite factor = 3 × 11 × 37 =
1,221
composite factor = 3
3 × 7 × 11 =
2,079
composite factor = 3
2 × 7 × 37 =
2,331
composite factor = 7 × 11 × 37 =
2,849
composite factor = 3
4 × 37 =
2,997
composite factor = 3
2 × 11 × 37 =
3,663
composite factor = 3
4 × 7 × 11 =
6,237
composite factor = 3
3 × 7 × 37 =
6,993
composite factor = 3 × 7 × 11 × 37 =
8,547
composite factor = 3
3 × 11 × 37 =
10,989
composite factor = 3
4 × 7 × 37 =
20,979
composite factor = 3
2 × 7 × 11 × 37 =
25,641
composite factor = 3
4 × 11 × 37 =
32,967
composite factor = 3
3 × 7 × 11 × 37 =
76,923
composite factor = 3
4 × 7 × 11 × 37 =
230,769
40 factors (divisors)
What times what is 230,769?
What number multiplied by what number equals 230,769?
All the combinations of any two natural numbers whose product equals 230,769.
1 × 230,769 = 230,769
3 × 76,923 = 230,769
7 × 32,967 = 230,769
9 × 25,641 = 230,769
11 × 20,979 = 230,769
21 × 10,989 = 230,769
27 × 8,547 = 230,769
33 × 6,993 = 230,769
37 × 6,237 = 230,769
63 × 3,663 = 230,769
77 × 2,997 = 230,769
81 × 2,849 = 230,769
99 × 2,331 = 230,769
111 × 2,079 = 230,769
189 × 1,221 = 230,769
231 × 999 = 230,769
259 × 891 = 230,769
297 × 777 = 230,769
333 × 693 = 230,769
407 × 567 = 230,769
20 unique multiplications The final answer:
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