To find all the divisors of the number 9,783,735:
- 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 9,783,735:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
9,783,735 = 3 × 5 × 13 × 131 × 383
9,783,735 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 9,783,735
- 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 =
3
prime factor =
5
prime factor =
13
composite factor = 3 × 5 =
15
composite factor = 3 × 13 =
39
composite factor = 5 × 13 =
65
prime factor =
131
composite factor = 3 × 5 × 13 =
195
prime factor =
383
composite factor = 3 × 131 =
393
composite factor = 5 × 131 =
655
composite factor = 3 × 383 =
1,149
composite factor = 13 × 131 =
1,703
composite factor = 5 × 383 =
1,915
composite factor = 3 × 5 × 131 =
1,965
This list continues below...
... This list continues from above
composite factor = 13 × 383 =
4,979
composite factor = 3 × 13 × 131 =
5,109
composite factor = 3 × 5 × 383 =
5,745
composite factor = 5 × 13 × 131 =
8,515
composite factor = 3 × 13 × 383 =
14,937
composite factor = 5 × 13 × 383 =
24,895
composite factor = 3 × 5 × 13 × 131 =
25,545
composite factor = 131 × 383 =
50,173
composite factor = 3 × 5 × 13 × 383 =
74,685
composite factor = 3 × 131 × 383 =
150,519
composite factor = 5 × 131 × 383 =
250,865
composite factor = 13 × 131 × 383 =
652,249
composite factor = 3 × 5 × 131 × 383 =
752,595
composite factor = 3 × 13 × 131 × 383 =
1,956,747
composite factor = 5 × 13 × 131 × 383 =
3,261,245
composite factor = 3 × 5 × 13 × 131 × 383 =
9,783,735
32 factors (divisors)
What times what is 9,783,735?
What number multiplied by what number equals 9,783,735?
All the combinations of any two natural numbers whose product equals 9,783,735.
1 × 9,783,735 = 9,783,735
3 × 3,261,245 = 9,783,735
5 × 1,956,747 = 9,783,735
13 × 752,595 = 9,783,735
15 × 652,249 = 9,783,735
39 × 250,865 = 9,783,735
65 × 150,519 = 9,783,735
131 × 74,685 = 9,783,735
195 × 50,173 = 9,783,735
383 × 25,545 = 9,783,735
393 × 24,895 = 9,783,735
655 × 14,937 = 9,783,735
1,149 × 8,515 = 9,783,735
1,703 × 5,745 = 9,783,735
1,915 × 5,109 = 9,783,735
1,965 × 4,979 = 9,783,735
16 unique multiplications The final answer:
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