To find all the divisors of the number 900,000,028:
- 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 900,000,028:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
900,000,028 = 22 × 23 × 683 × 14,323
900,000,028 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) = 3 × 2 × 2 × 2 = 24
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 900,000,028
- 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 =
23
composite factor = 2 × 23 =
46
composite factor = 2
2 × 23 =
92
prime factor =
683
composite factor = 2 × 683 =
1,366
composite factor = 2
2 × 683 =
2,732
prime factor =
14,323
composite factor = 23 × 683 =
15,709
composite factor = 2 × 14,323 =
28,646
This list continues below...
... This list continues from above
composite factor = 2 × 23 × 683 =
31,418
composite factor = 2
2 × 14,323 =
57,292
composite factor = 2
2 × 23 × 683 =
62,836
composite factor = 23 × 14,323 =
329,429
composite factor = 2 × 23 × 14,323 =
658,858
composite factor = 2
2 × 23 × 14,323 =
1,317,716
composite factor = 683 × 14,323 =
9,782,609
composite factor = 2 × 683 × 14,323 =
19,565,218
composite factor = 2
2 × 683 × 14,323 =
39,130,436
composite factor = 23 × 683 × 14,323 =
225,000,007
composite factor = 2 × 23 × 683 × 14,323 =
450,000,014
composite factor = 2
2 × 23 × 683 × 14,323 =
900,000,028
24 factors (divisors)
What times what is 900,000,028?
What number multiplied by what number equals 900,000,028?
All the combinations of any two natural numbers whose product equals 900,000,028.
1 × 900,000,028 = 900,000,028
2 × 450,000,014 = 900,000,028
4 × 225,000,007 = 900,000,028
23 × 39,130,436 = 900,000,028
46 × 19,565,218 = 900,000,028
92 × 9,782,609 = 900,000,028
683 × 1,317,716 = 900,000,028
1,366 × 658,858 = 900,000,028
2,732 × 329,429 = 900,000,028
14,323 × 62,836 = 900,000,028
15,709 × 57,292 = 900,000,028
28,646 × 31,418 = 900,000,028
12 unique multiplications The final answer:
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