To find all the divisors of the number 109,434:
- 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 109,434:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
109,434 = 2 × 3 × 13 × 23 × 61
109,434 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 109,434
- 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 =
3
composite factor = 2 × 3 =
6
prime factor =
13
prime factor =
23
composite factor = 2 × 13 =
26
composite factor = 3 × 13 =
39
composite factor = 2 × 23 =
46
prime factor =
61
composite factor = 3 × 23 =
69
composite factor = 2 × 3 × 13 =
78
composite factor = 2 × 61 =
122
composite factor = 2 × 3 × 23 =
138
composite factor = 3 × 61 =
183
composite factor = 13 × 23 =
299
This list continues below...
... This list continues from above
composite factor = 2 × 3 × 61 =
366
composite factor = 2 × 13 × 23 =
598
composite factor = 13 × 61 =
793
composite factor = 3 × 13 × 23 =
897
composite factor = 23 × 61 =
1,403
composite factor = 2 × 13 × 61 =
1,586
composite factor = 2 × 3 × 13 × 23 =
1,794
composite factor = 3 × 13 × 61 =
2,379
composite factor = 2 × 23 × 61 =
2,806
composite factor = 3 × 23 × 61 =
4,209
composite factor = 2 × 3 × 13 × 61 =
4,758
composite factor = 2 × 3 × 23 × 61 =
8,418
composite factor = 13 × 23 × 61 =
18,239
composite factor = 2 × 13 × 23 × 61 =
36,478
composite factor = 3 × 13 × 23 × 61 =
54,717
composite factor = 2 × 3 × 13 × 23 × 61 =
109,434
32 factors (divisors)
What times what is 109,434?
What number multiplied by what number equals 109,434?
All the combinations of any two natural numbers whose product equals 109,434.
1 × 109,434 = 109,434
2 × 54,717 = 109,434
3 × 36,478 = 109,434
6 × 18,239 = 109,434
13 × 8,418 = 109,434
23 × 4,758 = 109,434
26 × 4,209 = 109,434
39 × 2,806 = 109,434
46 × 2,379 = 109,434
61 × 1,794 = 109,434
69 × 1,586 = 109,434
78 × 1,403 = 109,434
122 × 897 = 109,434
138 × 793 = 109,434
183 × 598 = 109,434
299 × 366 = 109,434
16 unique multiplications The final answer:
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