To find all the divisors of the number 98,909,550:
- 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 98,909,550:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
98,909,550 = 2 × 32 × 52 × 219,799
98,909,550 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) × (2 + 1) × (1 + 1) = 2 × 3 × 3 × 2 = 36
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 98,909,550
- 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
prime factor =
5
composite factor = 2 × 3 =
6
composite factor = 3
2 =
9
composite factor = 2 × 5 =
10
composite factor = 3 × 5 =
15
composite factor = 2 × 3
2 =
18
composite factor = 5
2 =
25
composite factor = 2 × 3 × 5 =
30
composite factor = 3
2 × 5 =
45
composite factor = 2 × 5
2 =
50
composite factor = 3 × 5
2 =
75
composite factor = 2 × 3
2 × 5 =
90
composite factor = 2 × 3 × 5
2 =
150
composite factor = 3
2 × 5
2 =
225
composite factor = 2 × 3
2 × 5
2 =
450
This list continues below...
... This list continues from above
prime factor =
219,799
composite factor = 2 × 219,799 =
439,598
composite factor = 3 × 219,799 =
659,397
composite factor = 5 × 219,799 =
1,098,995
composite factor = 2 × 3 × 219,799 =
1,318,794
composite factor = 3
2 × 219,799 =
1,978,191
composite factor = 2 × 5 × 219,799 =
2,197,990
composite factor = 3 × 5 × 219,799 =
3,296,985
composite factor = 2 × 3
2 × 219,799 =
3,956,382
composite factor = 5
2 × 219,799 =
5,494,975
composite factor = 2 × 3 × 5 × 219,799 =
6,593,970
composite factor = 3
2 × 5 × 219,799 =
9,890,955
composite factor = 2 × 5
2 × 219,799 =
10,989,950
composite factor = 3 × 5
2 × 219,799 =
16,484,925
composite factor = 2 × 3
2 × 5 × 219,799 =
19,781,910
composite factor = 2 × 3 × 5
2 × 219,799 =
32,969,850
composite factor = 3
2 × 5
2 × 219,799 =
49,454,775
composite factor = 2 × 3
2 × 5
2 × 219,799 =
98,909,550
36 factors (divisors)
What times what is 98,909,550?
What number multiplied by what number equals 98,909,550?
All the combinations of any two natural numbers whose product equals 98,909,550.
1 × 98,909,550 = 98,909,550
2 × 49,454,775 = 98,909,550
3 × 32,969,850 = 98,909,550
5 × 19,781,910 = 98,909,550
6 × 16,484,925 = 98,909,550
9 × 10,989,950 = 98,909,550
10 × 9,890,955 = 98,909,550
15 × 6,593,970 = 98,909,550
18 × 5,494,975 = 98,909,550
25 × 3,956,382 = 98,909,550
30 × 3,296,985 = 98,909,550
45 × 2,197,990 = 98,909,550
50 × 1,978,191 = 98,909,550
75 × 1,318,794 = 98,909,550
90 × 1,098,995 = 98,909,550
150 × 659,397 = 98,909,550
225 × 439,598 = 98,909,550
450 × 219,799 = 98,909,550
18 unique multiplications The final answer:
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