To find all the divisors of the number 122,347,450:
- 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 122,347,450:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
122,347,450 = 2 × 52 × 131 × 18,679
122,347,450 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) × (2 + 1) × (1 + 1) × (1 + 1) = 2 × 3 × 2 × 2 = 24
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 122,347,450
- 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 =
5
composite factor = 2 × 5 =
10
composite factor = 5
2 =
25
composite factor = 2 × 5
2 =
50
prime factor =
131
composite factor = 2 × 131 =
262
composite factor = 5 × 131 =
655
composite factor = 2 × 5 × 131 =
1,310
composite factor = 5
2 × 131 =
3,275
composite factor = 2 × 5
2 × 131 =
6,550
This list continues below...
... This list continues from above
prime factor =
18,679
composite factor = 2 × 18,679 =
37,358
composite factor = 5 × 18,679 =
93,395
composite factor = 2 × 5 × 18,679 =
186,790
composite factor = 5
2 × 18,679 =
466,975
composite factor = 2 × 5
2 × 18,679 =
933,950
composite factor = 131 × 18,679 =
2,446,949
composite factor = 2 × 131 × 18,679 =
4,893,898
composite factor = 5 × 131 × 18,679 =
12,234,745
composite factor = 2 × 5 × 131 × 18,679 =
24,469,490
composite factor = 5
2 × 131 × 18,679 =
61,173,725
composite factor = 2 × 5
2 × 131 × 18,679 =
122,347,450
24 factors (divisors)
What times what is 122,347,450?
What number multiplied by what number equals 122,347,450?
All the combinations of any two natural numbers whose product equals 122,347,450.
1 × 122,347,450 = 122,347,450
2 × 61,173,725 = 122,347,450
5 × 24,469,490 = 122,347,450
10 × 12,234,745 = 122,347,450
25 × 4,893,898 = 122,347,450
50 × 2,446,949 = 122,347,450
131 × 933,950 = 122,347,450
262 × 466,975 = 122,347,450
655 × 186,790 = 122,347,450
1,310 × 93,395 = 122,347,450
3,275 × 37,358 = 122,347,450
6,550 × 18,679 = 122,347,450
12 unique multiplications The final answer:
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