To find all the divisors of the number 23,759,560:
- 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 23,759,560:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
23,759,560 = 23 × 5 × 112 × 4,909
23,759,560 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 = (3 + 1) × (1 + 1) × (2 + 1) × (1 + 1) = 4 × 2 × 3 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 23,759,560
- 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
3 =
8
composite factor = 2 × 5 =
10
prime factor =
11
composite factor = 2
2 × 5 =
20
composite factor = 2 × 11 =
22
composite factor = 2
3 × 5 =
40
composite factor = 2
2 × 11 =
44
composite factor = 5 × 11 =
55
composite factor = 2
3 × 11 =
88
composite factor = 2 × 5 × 11 =
110
composite factor = 11
2 =
121
composite factor = 2
2 × 5 × 11 =
220
composite factor = 2 × 11
2 =
242
composite factor = 2
3 × 5 × 11 =
440
composite factor = 2
2 × 11
2 =
484
composite factor = 5 × 11
2 =
605
composite factor = 2
3 × 11
2 =
968
composite factor = 2 × 5 × 11
2 =
1,210
composite factor = 2
2 × 5 × 11
2 =
2,420
composite factor = 2
3 × 5 × 11
2 =
4,840
This list continues below...
... This list continues from above
prime factor =
4,909
composite factor = 2 × 4,909 =
9,818
composite factor = 2
2 × 4,909 =
19,636
composite factor = 5 × 4,909 =
24,545
composite factor = 2
3 × 4,909 =
39,272
composite factor = 2 × 5 × 4,909 =
49,090
composite factor = 11 × 4,909 =
53,999
composite factor = 2
2 × 5 × 4,909 =
98,180
composite factor = 2 × 11 × 4,909 =
107,998
composite factor = 2
3 × 5 × 4,909 =
196,360
composite factor = 2
2 × 11 × 4,909 =
215,996
composite factor = 5 × 11 × 4,909 =
269,995
composite factor = 2
3 × 11 × 4,909 =
431,992
composite factor = 2 × 5 × 11 × 4,909 =
539,990
composite factor = 11
2 × 4,909 =
593,989
composite factor = 2
2 × 5 × 11 × 4,909 =
1,079,980
composite factor = 2 × 11
2 × 4,909 =
1,187,978
composite factor = 2
3 × 5 × 11 × 4,909 =
2,159,960
composite factor = 2
2 × 11
2 × 4,909 =
2,375,956
composite factor = 5 × 11
2 × 4,909 =
2,969,945
composite factor = 2
3 × 11
2 × 4,909 =
4,751,912
composite factor = 2 × 5 × 11
2 × 4,909 =
5,939,890
composite factor = 2
2 × 5 × 11
2 × 4,909 =
11,879,780
composite factor = 2
3 × 5 × 11
2 × 4,909 =
23,759,560
48 factors (divisors)
What times what is 23,759,560?
What number multiplied by what number equals 23,759,560?
All the combinations of any two natural numbers whose product equals 23,759,560.
1 × 23,759,560 = 23,759,560
2 × 11,879,780 = 23,759,560
4 × 5,939,890 = 23,759,560
5 × 4,751,912 = 23,759,560
8 × 2,969,945 = 23,759,560
10 × 2,375,956 = 23,759,560
11 × 2,159,960 = 23,759,560
20 × 1,187,978 = 23,759,560
22 × 1,079,980 = 23,759,560
40 × 593,989 = 23,759,560
44 × 539,990 = 23,759,560
55 × 431,992 = 23,759,560
88 × 269,995 = 23,759,560
110 × 215,996 = 23,759,560
121 × 196,360 = 23,759,560
220 × 107,998 = 23,759,560
242 × 98,180 = 23,759,560
440 × 53,999 = 23,759,560
484 × 49,090 = 23,759,560
605 × 39,272 = 23,759,560
968 × 24,545 = 23,759,560
1,210 × 19,636 = 23,759,560
2,420 × 9,818 = 23,759,560
4,840 × 4,909 = 23,759,560
24 unique multiplications The final answer:
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