To find all the divisors of the number 790,202,690:
- 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 790,202,690:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
790,202,690 = 2 × 5 × 67 × 859 × 1,373
790,202,690 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) × (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 2 × 2 × 2 × 2 × 2 = 32
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 790,202,690
- Multiply the prime factors involved in the prime factorization of the number in all their unique combinations, that give different results.
- 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
prime factor =
67
composite factor = 2 × 67 =
134
composite factor = 5 × 67 =
335
composite factor = 2 × 5 × 67 =
670
prime factor =
859
prime factor =
1,373
composite factor = 2 × 859 =
1,718
composite factor = 2 × 1,373 =
2,746
composite factor = 5 × 859 =
4,295
composite factor = 5 × 1,373 =
6,865
composite factor = 2 × 5 × 859 =
8,590
composite factor = 2 × 5 × 1,373 =
13,730
This list continues below...
... This list continues from above
composite factor = 67 × 859 =
57,553
composite factor = 67 × 1,373 =
91,991
composite factor = 2 × 67 × 859 =
115,106
composite factor = 2 × 67 × 1,373 =
183,982
composite factor = 5 × 67 × 859 =
287,765
composite factor = 5 × 67 × 1,373 =
459,955
composite factor = 2 × 5 × 67 × 859 =
575,530
composite factor = 2 × 5 × 67 × 1,373 =
919,910
composite factor = 859 × 1,373 =
1,179,407
composite factor = 2 × 859 × 1,373 =
2,358,814
composite factor = 5 × 859 × 1,373 =
5,897,035
composite factor = 2 × 5 × 859 × 1,373 =
11,794,070
composite factor = 67 × 859 × 1,373 =
79,020,269
composite factor = 2 × 67 × 859 × 1,373 =
158,040,538
composite factor = 5 × 67 × 859 × 1,373 =
395,101,345
composite factor = 2 × 5 × 67 × 859 × 1,373 =
790,202,690
32 factors (divisors)
What times what is 790,202,690?
What number multiplied by what number equals 790,202,690?
All the combinations of any two natural numbers whose product equals 790,202,690.
1 × 790,202,690 = 790,202,690
2 × 395,101,345 = 790,202,690
5 × 158,040,538 = 790,202,690
10 × 79,020,269 = 790,202,690
67 × 11,794,070 = 790,202,690
134 × 5,897,035 = 790,202,690
335 × 2,358,814 = 790,202,690
670 × 1,179,407 = 790,202,690
859 × 919,910 = 790,202,690
1,373 × 575,530 = 790,202,690
1,718 × 459,955 = 790,202,690
2,746 × 287,765 = 790,202,690
4,295 × 183,982 = 790,202,690
6,865 × 115,106 = 790,202,690
8,590 × 91,991 = 790,202,690
13,730 × 57,553 = 790,202,690
16 unique multiplications The final answer:
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