To find all the divisors of the number 717,850:
- 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 717,850:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
717,850 = 2 × 52 × 72 × 293
717,850 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 717,850
- 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
prime factor =
7
composite factor = 2 × 5 =
10
composite factor = 2 × 7 =
14
composite factor = 5
2 =
25
composite factor = 5 × 7 =
35
composite factor = 7
2 =
49
composite factor = 2 × 5
2 =
50
composite factor = 2 × 5 × 7 =
70
composite factor = 2 × 7
2 =
98
composite factor = 5
2 × 7 =
175
composite factor = 5 × 7
2 =
245
prime factor =
293
composite factor = 2 × 5
2 × 7 =
350
composite factor = 2 × 5 × 7
2 =
490
composite factor = 2 × 293 =
586
This list continues below...
... This list continues from above
composite factor = 5
2 × 7
2 =
1,225
composite factor = 5 × 293 =
1,465
composite factor = 7 × 293 =
2,051
composite factor = 2 × 5
2 × 7
2 =
2,450
composite factor = 2 × 5 × 293 =
2,930
composite factor = 2 × 7 × 293 =
4,102
composite factor = 5
2 × 293 =
7,325
composite factor = 5 × 7 × 293 =
10,255
composite factor = 7
2 × 293 =
14,357
composite factor = 2 × 5
2 × 293 =
14,650
composite factor = 2 × 5 × 7 × 293 =
20,510
composite factor = 2 × 7
2 × 293 =
28,714
composite factor = 5
2 × 7 × 293 =
51,275
composite factor = 5 × 7
2 × 293 =
71,785
composite factor = 2 × 5
2 × 7 × 293 =
102,550
composite factor = 2 × 5 × 7
2 × 293 =
143,570
composite factor = 5
2 × 7
2 × 293 =
358,925
composite factor = 2 × 5
2 × 7
2 × 293 =
717,850
36 factors (divisors)
What times what is 717,850?
What number multiplied by what number equals 717,850?
All the combinations of any two natural numbers whose product equals 717,850.
1 × 717,850 = 717,850
2 × 358,925 = 717,850
5 × 143,570 = 717,850
7 × 102,550 = 717,850
10 × 71,785 = 717,850
14 × 51,275 = 717,850
25 × 28,714 = 717,850
35 × 20,510 = 717,850
49 × 14,650 = 717,850
50 × 14,357 = 717,850
70 × 10,255 = 717,850
98 × 7,325 = 717,850
175 × 4,102 = 717,850
245 × 2,930 = 717,850
293 × 2,450 = 717,850
350 × 2,051 = 717,850
490 × 1,465 = 717,850
586 × 1,225 = 717,850
18 unique multiplications The final answer:
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