To find all the divisors of the number 269,230:
- 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 269,230:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
269,230 = 2 × 5 × 13 × 19 × 109
269,230 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 = (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 2 × 2 × 2 × 2 × 2 = 32
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 269,230
- Multiply the prime factors involved in the prime factorization of the number in all their unique combinations, that give different results.
- 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 =
2
prime factor =
5
composite factor = 2 × 5 =
10
prime factor =
13
prime factor =
19
composite factor = 2 × 13 =
26
composite factor = 2 × 19 =
38
composite factor = 5 × 13 =
65
composite factor = 5 × 19 =
95
prime factor =
109
composite factor = 2 × 5 × 13 =
130
composite factor = 2 × 5 × 19 =
190
composite factor = 2 × 109 =
218
composite factor = 13 × 19 =
247
composite factor = 2 × 13 × 19 =
494
This list continues below...
... This list continues from above
composite factor = 5 × 109 =
545
composite factor = 2 × 5 × 109 =
1,090
composite factor = 5 × 13 × 19 =
1,235
composite factor = 13 × 109 =
1,417
composite factor = 19 × 109 =
2,071
composite factor = 2 × 5 × 13 × 19 =
2,470
composite factor = 2 × 13 × 109 =
2,834
composite factor = 2 × 19 × 109 =
4,142
composite factor = 5 × 13 × 109 =
7,085
composite factor = 5 × 19 × 109 =
10,355
composite factor = 2 × 5 × 13 × 109 =
14,170
composite factor = 2 × 5 × 19 × 109 =
20,710
composite factor = 13 × 19 × 109 =
26,923
composite factor = 2 × 13 × 19 × 109 =
53,846
composite factor = 5 × 13 × 19 × 109 =
134,615
composite factor = 2 × 5 × 13 × 19 × 109 =
269,230
32 factors (divisors)
What times what is 269,230?
What number multiplied by what number equals 269,230?
All the combinations of any two natural numbers whose product equals 269,230.
1 × 269,230 = 269,230
2 × 134,615 = 269,230
5 × 53,846 = 269,230
10 × 26,923 = 269,230
13 × 20,710 = 269,230
19 × 14,170 = 269,230
26 × 10,355 = 269,230
38 × 7,085 = 269,230
65 × 4,142 = 269,230
95 × 2,834 = 269,230
109 × 2,470 = 269,230
130 × 2,071 = 269,230
190 × 1,417 = 269,230
218 × 1,235 = 269,230
247 × 1,090 = 269,230
494 × 545 = 269,230
16 unique multiplications The final answer:
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