To find all the divisors of the number 9,123,762:
- 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 9,123,762:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
9,123,762 = 2 × 3 × 19 × 163 × 491
9,123,762 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 9,123,762
- 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 =
19
composite factor = 2 × 19 =
38
composite factor = 3 × 19 =
57
composite factor = 2 × 3 × 19 =
114
prime factor =
163
composite factor = 2 × 163 =
326
composite factor = 3 × 163 =
489
prime factor =
491
composite factor = 2 × 3 × 163 =
978
composite factor = 2 × 491 =
982
composite factor = 3 × 491 =
1,473
composite factor = 2 × 3 × 491 =
2,946
This list continues below...
... This list continues from above
composite factor = 19 × 163 =
3,097
composite factor = 2 × 19 × 163 =
6,194
composite factor = 3 × 19 × 163 =
9,291
composite factor = 19 × 491 =
9,329
composite factor = 2 × 3 × 19 × 163 =
18,582
composite factor = 2 × 19 × 491 =
18,658
composite factor = 3 × 19 × 491 =
27,987
composite factor = 2 × 3 × 19 × 491 =
55,974
composite factor = 163 × 491 =
80,033
composite factor = 2 × 163 × 491 =
160,066
composite factor = 3 × 163 × 491 =
240,099
composite factor = 2 × 3 × 163 × 491 =
480,198
composite factor = 19 × 163 × 491 =
1,520,627
composite factor = 2 × 19 × 163 × 491 =
3,041,254
composite factor = 3 × 19 × 163 × 491 =
4,561,881
composite factor = 2 × 3 × 19 × 163 × 491 =
9,123,762
32 factors (divisors)
What times what is 9,123,762?
What number multiplied by what number equals 9,123,762?
All the combinations of any two natural numbers whose product equals 9,123,762.
1 × 9,123,762 = 9,123,762
2 × 4,561,881 = 9,123,762
3 × 3,041,254 = 9,123,762
6 × 1,520,627 = 9,123,762
19 × 480,198 = 9,123,762
38 × 240,099 = 9,123,762
57 × 160,066 = 9,123,762
114 × 80,033 = 9,123,762
163 × 55,974 = 9,123,762
326 × 27,987 = 9,123,762
489 × 18,658 = 9,123,762
491 × 18,582 = 9,123,762
978 × 9,329 = 9,123,762
982 × 9,291 = 9,123,762
1,473 × 6,194 = 9,123,762
2,946 × 3,097 = 9,123,762
16 unique multiplications The final answer:
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