To find all the divisors of the number 1,750,749:
- 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 1,750,749:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
1,750,749 = 3 × 7 × 112 × 13 × 53
1,750,749 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) × (1 + 1) × (2 + 1) × (1 + 1) × (1 + 1) = 2 × 2 × 3 × 2 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 1,750,749
- 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 =
7
prime factor =
11
prime factor =
13
composite factor = 3 × 7 =
21
composite factor = 3 × 11 =
33
composite factor = 3 × 13 =
39
prime factor =
53
composite factor = 7 × 11 =
77
composite factor = 7 × 13 =
91
composite factor = 11
2 =
121
composite factor = 11 × 13 =
143
composite factor = 3 × 53 =
159
composite factor = 3 × 7 × 11 =
231
composite factor = 3 × 7 × 13 =
273
composite factor = 3 × 11
2 =
363
composite factor = 7 × 53 =
371
composite factor = 3 × 11 × 13 =
429
composite factor = 11 × 53 =
583
composite factor = 13 × 53 =
689
composite factor = 7 × 11
2 =
847
composite factor = 7 × 11 × 13 =
1,001
composite factor = 3 × 7 × 53 =
1,113
This list continues below...
... This list continues from above
composite factor = 11
2 × 13 =
1,573
composite factor = 3 × 11 × 53 =
1,749
composite factor = 3 × 13 × 53 =
2,067
composite factor = 3 × 7 × 11
2 =
2,541
composite factor = 3 × 7 × 11 × 13 =
3,003
composite factor = 7 × 11 × 53 =
4,081
composite factor = 3 × 11
2 × 13 =
4,719
composite factor = 7 × 13 × 53 =
4,823
composite factor = 11
2 × 53 =
6,413
composite factor = 11 × 13 × 53 =
7,579
composite factor = 7 × 11
2 × 13 =
11,011
composite factor = 3 × 7 × 11 × 53 =
12,243
composite factor = 3 × 7 × 13 × 53 =
14,469
composite factor = 3 × 11
2 × 53 =
19,239
composite factor = 3 × 11 × 13 × 53 =
22,737
composite factor = 3 × 7 × 11
2 × 13 =
33,033
composite factor = 7 × 11
2 × 53 =
44,891
composite factor = 7 × 11 × 13 × 53 =
53,053
composite factor = 11
2 × 13 × 53 =
83,369
composite factor = 3 × 7 × 11
2 × 53 =
134,673
composite factor = 3 × 7 × 11 × 13 × 53 =
159,159
composite factor = 3 × 11
2 × 13 × 53 =
250,107
composite factor = 7 × 11
2 × 13 × 53 =
583,583
composite factor = 3 × 7 × 11
2 × 13 × 53 =
1,750,749
48 factors (divisors)
What times what is 1,750,749?
What number multiplied by what number equals 1,750,749?
All the combinations of any two natural numbers whose product equals 1,750,749.
1 × 1,750,749 = 1,750,749
3 × 583,583 = 1,750,749
7 × 250,107 = 1,750,749
11 × 159,159 = 1,750,749
13 × 134,673 = 1,750,749
21 × 83,369 = 1,750,749
33 × 53,053 = 1,750,749
39 × 44,891 = 1,750,749
53 × 33,033 = 1,750,749
77 × 22,737 = 1,750,749
91 × 19,239 = 1,750,749
121 × 14,469 = 1,750,749
143 × 12,243 = 1,750,749
159 × 11,011 = 1,750,749
231 × 7,579 = 1,750,749
273 × 6,413 = 1,750,749
363 × 4,823 = 1,750,749
371 × 4,719 = 1,750,749
429 × 4,081 = 1,750,749
583 × 3,003 = 1,750,749
689 × 2,541 = 1,750,749
847 × 2,067 = 1,750,749
1,001 × 1,749 = 1,750,749
1,113 × 1,573 = 1,750,749
24 unique multiplications The final answer:
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