To find all the divisors of the number 384,911,475:
- 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 384,911,475:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
384,911,475 = 3 × 52 × 13 × 211 × 1,871
384,911,475 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 384,911,475
- 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 =
3
prime factor =
5
prime factor =
13
composite factor = 3 × 5 =
15
composite factor = 5
2 =
25
composite factor = 3 × 13 =
39
composite factor = 5 × 13 =
65
composite factor = 3 × 5
2 =
75
composite factor = 3 × 5 × 13 =
195
prime factor =
211
composite factor = 5
2 × 13 =
325
composite factor = 3 × 211 =
633
composite factor = 3 × 5
2 × 13 =
975
composite factor = 5 × 211 =
1,055
prime factor =
1,871
composite factor = 13 × 211 =
2,743
composite factor = 3 × 5 × 211 =
3,165
composite factor = 5
2 × 211 =
5,275
composite factor = 3 × 1,871 =
5,613
composite factor = 3 × 13 × 211 =
8,229
composite factor = 5 × 1,871 =
9,355
composite factor = 5 × 13 × 211 =
13,715
composite factor = 3 × 5
2 × 211 =
15,825
This list continues below...
... This list continues from above
composite factor = 13 × 1,871 =
24,323
composite factor = 3 × 5 × 1,871 =
28,065
composite factor = 3 × 5 × 13 × 211 =
41,145
composite factor = 5
2 × 1,871 =
46,775
composite factor = 5
2 × 13 × 211 =
68,575
composite factor = 3 × 13 × 1,871 =
72,969
composite factor = 5 × 13 × 1,871 =
121,615
composite factor = 3 × 5
2 × 1,871 =
140,325
composite factor = 3 × 5
2 × 13 × 211 =
205,725
composite factor = 3 × 5 × 13 × 1,871 =
364,845
composite factor = 211 × 1,871 =
394,781
composite factor = 5
2 × 13 × 1,871 =
608,075
composite factor = 3 × 211 × 1,871 =
1,184,343
composite factor = 3 × 5
2 × 13 × 1,871 =
1,824,225
composite factor = 5 × 211 × 1,871 =
1,973,905
composite factor = 13 × 211 × 1,871 =
5,132,153
composite factor = 3 × 5 × 211 × 1,871 =
5,921,715
composite factor = 5
2 × 211 × 1,871 =
9,869,525
composite factor = 3 × 13 × 211 × 1,871 =
15,396,459
composite factor = 5 × 13 × 211 × 1,871 =
25,660,765
composite factor = 3 × 5
2 × 211 × 1,871 =
29,608,575
composite factor = 3 × 5 × 13 × 211 × 1,871 =
76,982,295
composite factor = 5
2 × 13 × 211 × 1,871 =
128,303,825
composite factor = 3 × 5
2 × 13 × 211 × 1,871 =
384,911,475
48 factors (divisors)
What times what is 384,911,475?
What number multiplied by what number equals 384,911,475?
All the combinations of any two natural numbers whose product equals 384,911,475.
1 × 384,911,475 = 384,911,475
3 × 128,303,825 = 384,911,475
5 × 76,982,295 = 384,911,475
13 × 29,608,575 = 384,911,475
15 × 25,660,765 = 384,911,475
25 × 15,396,459 = 384,911,475
39 × 9,869,525 = 384,911,475
65 × 5,921,715 = 384,911,475
75 × 5,132,153 = 384,911,475
195 × 1,973,905 = 384,911,475
211 × 1,824,225 = 384,911,475
325 × 1,184,343 = 384,911,475
633 × 608,075 = 384,911,475
975 × 394,781 = 384,911,475
1,055 × 364,845 = 384,911,475
1,871 × 205,725 = 384,911,475
2,743 × 140,325 = 384,911,475
3,165 × 121,615 = 384,911,475
5,275 × 72,969 = 384,911,475
5,613 × 68,575 = 384,911,475
8,229 × 46,775 = 384,911,475
9,355 × 41,145 = 384,911,475
13,715 × 28,065 = 384,911,475
15,825 × 24,323 = 384,911,475
24 unique multiplications The final answer:
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