To find all the divisors of the number 4,046,880:
- 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 4,046,880:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
4,046,880 = 25 × 3 × 5 × 8,431
4,046,880 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 = (5 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 6 × 2 × 2 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 4,046,880
- 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 =
3
composite factor = 2
2 =
4
prime factor =
5
composite factor = 2 × 3 =
6
composite factor = 2
3 =
8
composite factor = 2 × 5 =
10
composite factor = 2
2 × 3 =
12
composite factor = 3 × 5 =
15
composite factor = 2
4 =
16
composite factor = 2
2 × 5 =
20
composite factor = 2
3 × 3 =
24
composite factor = 2 × 3 × 5 =
30
composite factor = 2
5 =
32
composite factor = 2
3 × 5 =
40
composite factor = 2
4 × 3 =
48
composite factor = 2
2 × 3 × 5 =
60
composite factor = 2
4 × 5 =
80
composite factor = 2
5 × 3 =
96
composite factor = 2
3 × 3 × 5 =
120
composite factor = 2
5 × 5 =
160
composite factor = 2
4 × 3 × 5 =
240
composite factor = 2
5 × 3 × 5 =
480
This list continues below...
... This list continues from above
prime factor =
8,431
composite factor = 2 × 8,431 =
16,862
composite factor = 3 × 8,431 =
25,293
composite factor = 2
2 × 8,431 =
33,724
composite factor = 5 × 8,431 =
42,155
composite factor = 2 × 3 × 8,431 =
50,586
composite factor = 2
3 × 8,431 =
67,448
composite factor = 2 × 5 × 8,431 =
84,310
composite factor = 2
2 × 3 × 8,431 =
101,172
composite factor = 3 × 5 × 8,431 =
126,465
composite factor = 2
4 × 8,431 =
134,896
composite factor = 2
2 × 5 × 8,431 =
168,620
composite factor = 2
3 × 3 × 8,431 =
202,344
composite factor = 2 × 3 × 5 × 8,431 =
252,930
composite factor = 2
5 × 8,431 =
269,792
composite factor = 2
3 × 5 × 8,431 =
337,240
composite factor = 2
4 × 3 × 8,431 =
404,688
composite factor = 2
2 × 3 × 5 × 8,431 =
505,860
composite factor = 2
4 × 5 × 8,431 =
674,480
composite factor = 2
5 × 3 × 8,431 =
809,376
composite factor = 2
3 × 3 × 5 × 8,431 =
1,011,720
composite factor = 2
5 × 5 × 8,431 =
1,348,960
composite factor = 2
4 × 3 × 5 × 8,431 =
2,023,440
composite factor = 2
5 × 3 × 5 × 8,431 =
4,046,880
48 factors (divisors)
What times what is 4,046,880?
What number multiplied by what number equals 4,046,880?
All the combinations of any two natural numbers whose product equals 4,046,880.
1 × 4,046,880 = 4,046,880
2 × 2,023,440 = 4,046,880
3 × 1,348,960 = 4,046,880
4 × 1,011,720 = 4,046,880
5 × 809,376 = 4,046,880
6 × 674,480 = 4,046,880
8 × 505,860 = 4,046,880
10 × 404,688 = 4,046,880
12 × 337,240 = 4,046,880
15 × 269,792 = 4,046,880
16 × 252,930 = 4,046,880
20 × 202,344 = 4,046,880
24 × 168,620 = 4,046,880
30 × 134,896 = 4,046,880
32 × 126,465 = 4,046,880
40 × 101,172 = 4,046,880
48 × 84,310 = 4,046,880
60 × 67,448 = 4,046,880
80 × 50,586 = 4,046,880
96 × 42,155 = 4,046,880
120 × 33,724 = 4,046,880
160 × 25,293 = 4,046,880
240 × 16,862 = 4,046,880
480 × 8,431 = 4,046,880
24 unique multiplications The final answer:
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