1 and 343 are two numbers that do.
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They are 7 times 49 = 343
1, 7, 49, 343.
They are: 1*7*49 - 343
343 is a composite number. This is because composite numbers are any number that has more than two factors(one and itself). Therefore, since 7 and 49 are factors of 343 that makes it a composite number.
343 = 73, 2401 = 74, so 7, 49 and 343 divide into both numbers.