There are two natural numbers whose least common multiple is 640 and the greatest common divisor is 8, but these two numbers are not divisible by each other. These two numbers are () and ()

There are two natural numbers whose least common multiple is 640 and the greatest common divisor is 8, but they are not divisible by each other. They are (40) and (128)

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1. There is a six digit a1989b which can be divided by 44. This six digit is () the difference between two natural numbers is 3, and their greatest common factor and least common multiple are 180 There is a six digit a1989b that can be divided by 44. This six digit is () The difference between two natural numbers is 3, and their greatest common factor and least common multiple are 180. These two numbers are () and ()
2. The greatest common divisor of two numbers is 15, the least common multiple is 180, and the large number is not a multiple of a decimal. What are the two numbers?
3. If a large number is a multiple of a decimal, then the greatest common factor of the two numbers is______ The least common multiple of these two numbers is______ ．
4. If a large number is a multiple of a decimal, then the greatest common factor of the two numbers is______ The least common multiple of these two numbers is______ ．
5. The number a is 24, the least common multiple of a and B is 168, and the greatest common divisor is 4?
6. It is known that the number a is 24, the least common multiple of it and number B is 168, their greatest common divisor is 12, and number B is?
7. The number a is 24, the least common multiple of a and B is 168, and the greatest common divisor is 4?
8. The number a is 24, the least common multiple of a and B is 168, the greatest common factor is four, what is the number B?
9. A = 2 * 3 * a, B = 3 * 5 * B, the greatest common divisor of a and B is 15, and the least common multiple of a and B is?
10. A = 2 × 3 × 5, B = 2 × 5 × 7, the greatest common factor of a and B is______ The least common multiple is______ ．
11. The least common multiple of two integers is 140, the greatest common divisor is 4, and decimals cannot divide large numbers
12. What is the greatest common factor of 8 and 64? What is the least common multiple?
13. The greatest common divisor of 36 and 24 is___ The least common multiple is___ ．
14. Is there a natural number whose product of all true divisors equals itself?
15. Natural numbers a and B are divisors of their least common multiple
16. Find out not more than 300 of only 15 divisors of all natural numbers!
17. The natural number P has 9 divisors and the natural number Q has 10 divisors. The least common multiple of P and Q is 2800. What are Q and P? If it is understandable, I will adopt it
18. The greatest divisor of two natural numbers is 7, the least common multiple is 84, and the sum of two natural numbers is 49?
19. In & nbsp; 1, 2, 12, 37, and 51, odd numbers have______ Prime numbers have______ The total number is______ ．
20. 1. Which of 2; 18; 37; 51; 60; 153; 235 are prime numbers and which are composite numbers