To find all the divisors of the number 23,809,450:
- 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 23,809,450:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
23,809,450 = 2 × 52 × 7 × 59 × 1,153
23,809,450 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) × (2 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 2 × 3 × 2 × 2 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 23,809,450
- 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
prime factor =
5
prime factor =
7
composite factor = 2 × 5 =
10
composite factor = 2 × 7 =
14
composite factor = 5
2 =
25
composite factor = 5 × 7 =
35
composite factor = 2 × 5
2 =
50
prime factor =
59
composite factor = 2 × 5 × 7 =
70
composite factor = 2 × 59 =
118
composite factor = 5
2 × 7 =
175
composite factor = 5 × 59 =
295
composite factor = 2 × 5
2 × 7 =
350
composite factor = 7 × 59 =
413
composite factor = 2 × 5 × 59 =
590
composite factor = 2 × 7 × 59 =
826
prime factor =
1,153
composite factor = 5
2 × 59 =
1,475
composite factor = 5 × 7 × 59 =
2,065
composite factor = 2 × 1,153 =
2,306
composite factor = 2 × 5
2 × 59 =
2,950
composite factor = 2 × 5 × 7 × 59 =
4,130
This list continues below...
... This list continues from above
composite factor = 5 × 1,153 =
5,765
composite factor = 7 × 1,153 =
8,071
composite factor = 5
2 × 7 × 59 =
10,325
composite factor = 2 × 5 × 1,153 =
11,530
composite factor = 2 × 7 × 1,153 =
16,142
composite factor = 2 × 5
2 × 7 × 59 =
20,650
composite factor = 5
2 × 1,153 =
28,825
composite factor = 5 × 7 × 1,153 =
40,355
composite factor = 2 × 5
2 × 1,153 =
57,650
composite factor = 59 × 1,153 =
68,027
composite factor = 2 × 5 × 7 × 1,153 =
80,710
composite factor = 2 × 59 × 1,153 =
136,054
composite factor = 5
2 × 7 × 1,153 =
201,775
composite factor = 5 × 59 × 1,153 =
340,135
composite factor = 2 × 5
2 × 7 × 1,153 =
403,550
composite factor = 7 × 59 × 1,153 =
476,189
composite factor = 2 × 5 × 59 × 1,153 =
680,270
composite factor = 2 × 7 × 59 × 1,153 =
952,378
composite factor = 5
2 × 59 × 1,153 =
1,700,675
composite factor = 5 × 7 × 59 × 1,153 =
2,380,945
composite factor = 2 × 5
2 × 59 × 1,153 =
3,401,350
composite factor = 2 × 5 × 7 × 59 × 1,153 =
4,761,890
composite factor = 5
2 × 7 × 59 × 1,153 =
11,904,725
composite factor = 2 × 5
2 × 7 × 59 × 1,153 =
23,809,450
48 factors (divisors)
What times what is 23,809,450?
What number multiplied by what number equals 23,809,450?
All the combinations of any two natural numbers whose product equals 23,809,450.
1 × 23,809,450 = 23,809,450
2 × 11,904,725 = 23,809,450
5 × 4,761,890 = 23,809,450
7 × 3,401,350 = 23,809,450
10 × 2,380,945 = 23,809,450
14 × 1,700,675 = 23,809,450
25 × 952,378 = 23,809,450
35 × 680,270 = 23,809,450
50 × 476,189 = 23,809,450
59 × 403,550 = 23,809,450
70 × 340,135 = 23,809,450
118 × 201,775 = 23,809,450
175 × 136,054 = 23,809,450
295 × 80,710 = 23,809,450
350 × 68,027 = 23,809,450
413 × 57,650 = 23,809,450
590 × 40,355 = 23,809,450
826 × 28,825 = 23,809,450
1,153 × 20,650 = 23,809,450
1,475 × 16,142 = 23,809,450
2,065 × 11,530 = 23,809,450
2,306 × 10,325 = 23,809,450
2,950 × 8,071 = 23,809,450
4,130 × 5,765 = 23,809,450
24 unique multiplications The final answer:
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