To find all the divisors of the number 16,469,900:
- 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 16,469,900:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
16,469,900 = 22 × 52 × 109 × 1,511
16,469,900 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 = (2 + 1) × (2 + 1) × (1 + 1) × (1 + 1) = 3 × 3 × 2 × 2 = 36
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 16,469,900
- 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 =
2
composite factor = 2
2 =
4
prime factor =
5
composite factor = 2 × 5 =
10
composite factor = 2
2 × 5 =
20
composite factor = 5
2 =
25
composite factor = 2 × 5
2 =
50
composite factor = 2
2 × 5
2 =
100
prime factor =
109
composite factor = 2 × 109 =
218
composite factor = 2
2 × 109 =
436
composite factor = 5 × 109 =
545
composite factor = 2 × 5 × 109 =
1,090
prime factor =
1,511
composite factor = 2
2 × 5 × 109 =
2,180
composite factor = 5
2 × 109 =
2,725
composite factor = 2 × 1,511 =
3,022
This list continues below...
... This list continues from above
composite factor = 2 × 5
2 × 109 =
5,450
composite factor = 2
2 × 1,511 =
6,044
composite factor = 5 × 1,511 =
7,555
composite factor = 2
2 × 5
2 × 109 =
10,900
composite factor = 2 × 5 × 1,511 =
15,110
composite factor = 2
2 × 5 × 1,511 =
30,220
composite factor = 5
2 × 1,511 =
37,775
composite factor = 2 × 5
2 × 1,511 =
75,550
composite factor = 2
2 × 5
2 × 1,511 =
151,100
composite factor = 109 × 1,511 =
164,699
composite factor = 2 × 109 × 1,511 =
329,398
composite factor = 2
2 × 109 × 1,511 =
658,796
composite factor = 5 × 109 × 1,511 =
823,495
composite factor = 2 × 5 × 109 × 1,511 =
1,646,990
composite factor = 2
2 × 5 × 109 × 1,511 =
3,293,980
composite factor = 5
2 × 109 × 1,511 =
4,117,475
composite factor = 2 × 5
2 × 109 × 1,511 =
8,234,950
composite factor = 2
2 × 5
2 × 109 × 1,511 =
16,469,900
36 factors (divisors)
What times what is 16,469,900?
What number multiplied by what number equals 16,469,900?
All the combinations of any two natural numbers whose product equals 16,469,900.
1 × 16,469,900 = 16,469,900
2 × 8,234,950 = 16,469,900
4 × 4,117,475 = 16,469,900
5 × 3,293,980 = 16,469,900
10 × 1,646,990 = 16,469,900
20 × 823,495 = 16,469,900
25 × 658,796 = 16,469,900
50 × 329,398 = 16,469,900
100 × 164,699 = 16,469,900
109 × 151,100 = 16,469,900
218 × 75,550 = 16,469,900
436 × 37,775 = 16,469,900
545 × 30,220 = 16,469,900
1,090 × 15,110 = 16,469,900
1,511 × 10,900 = 16,469,900
2,180 × 7,555 = 16,469,900
2,725 × 6,044 = 16,469,900
3,022 × 5,450 = 16,469,900
18 unique multiplications The final answer:
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