2530000000 is one such number.
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Common three-digit multiples of 27 and 11 are 297, 594 and 891. None of their digits add up to 10.
23 i guessed. you can check. i don't know.
abcabc=abc x 1001 1001 = 7 x 11 x 13 So such number as at least 4 prime factors: if abc is prime, then 4 factors only if abc is not prime then at least 4 factors
In the absence of a specific number, 8, 9, 10 and 11 can all be factors. In fact, they're all factors of 3960.
20 and 30 All numbers have at least one common factor.