To find all the divisors of the number 1,507,764:
- 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 1,507,764:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
1,507,764 = 22 × 3 × 17 × 19 × 389
1,507,764 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 = (2 + 1) × (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 3 × 2 × 2 × 2 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 1,507,764
- 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
composite factor = 2 × 3 =
6
composite factor = 2
2 × 3 =
12
prime factor =
17
prime factor =
19
composite factor = 2 × 17 =
34
composite factor = 2 × 19 =
38
composite factor = 3 × 17 =
51
composite factor = 3 × 19 =
57
composite factor = 2
2 × 17 =
68
composite factor = 2
2 × 19 =
76
composite factor = 2 × 3 × 17 =
102
composite factor = 2 × 3 × 19 =
114
composite factor = 2
2 × 3 × 17 =
204
composite factor = 2
2 × 3 × 19 =
228
composite factor = 17 × 19 =
323
prime factor =
389
composite factor = 2 × 17 × 19 =
646
composite factor = 2 × 389 =
778
composite factor = 3 × 17 × 19 =
969
composite factor = 3 × 389 =
1,167
This list continues below...
... This list continues from above
composite factor = 2
2 × 17 × 19 =
1,292
composite factor = 2
2 × 389 =
1,556
composite factor = 2 × 3 × 17 × 19 =
1,938
composite factor = 2 × 3 × 389 =
2,334
composite factor = 2
2 × 3 × 17 × 19 =
3,876
composite factor = 2
2 × 3 × 389 =
4,668
composite factor = 17 × 389 =
6,613
composite factor = 19 × 389 =
7,391
composite factor = 2 × 17 × 389 =
13,226
composite factor = 2 × 19 × 389 =
14,782
composite factor = 3 × 17 × 389 =
19,839
composite factor = 3 × 19 × 389 =
22,173
composite factor = 2
2 × 17 × 389 =
26,452
composite factor = 2
2 × 19 × 389 =
29,564
composite factor = 2 × 3 × 17 × 389 =
39,678
composite factor = 2 × 3 × 19 × 389 =
44,346
composite factor = 2
2 × 3 × 17 × 389 =
79,356
composite factor = 2
2 × 3 × 19 × 389 =
88,692
composite factor = 17 × 19 × 389 =
125,647
composite factor = 2 × 17 × 19 × 389 =
251,294
composite factor = 3 × 17 × 19 × 389 =
376,941
composite factor = 2
2 × 17 × 19 × 389 =
502,588
composite factor = 2 × 3 × 17 × 19 × 389 =
753,882
composite factor = 2
2 × 3 × 17 × 19 × 389 =
1,507,764
48 factors (divisors)
What times what is 1,507,764?
What number multiplied by what number equals 1,507,764?
All the combinations of any two natural numbers whose product equals 1,507,764.
1 × 1,507,764 = 1,507,764
2 × 753,882 = 1,507,764
3 × 502,588 = 1,507,764
4 × 376,941 = 1,507,764
6 × 251,294 = 1,507,764
12 × 125,647 = 1,507,764
17 × 88,692 = 1,507,764
19 × 79,356 = 1,507,764
34 × 44,346 = 1,507,764
38 × 39,678 = 1,507,764
51 × 29,564 = 1,507,764
57 × 26,452 = 1,507,764
68 × 22,173 = 1,507,764
76 × 19,839 = 1,507,764
102 × 14,782 = 1,507,764
114 × 13,226 = 1,507,764
204 × 7,391 = 1,507,764
228 × 6,613 = 1,507,764
323 × 4,668 = 1,507,764
389 × 3,876 = 1,507,764
646 × 2,334 = 1,507,764
778 × 1,938 = 1,507,764
969 × 1,556 = 1,507,764
1,167 × 1,292 = 1,507,764
24 unique multiplications The final answer:
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