6 + 120 + 900 = 1,026
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The factors of 342 are:1, 2, 3, 6, 9, 18, 19, 38, 57, 114, 171, 342.
2 x 3 x 3 x 7 = 126 2 x 3 x 5 x 7 = 210 2 x 3 x 7 = 42, the GCF
Yes. Have you tried dividing by 3 to see if you get a whole number? Also, if the digits of an integer add up to a number divisible by 3, then the number itself must be divisible by 3. (Special case for dividing by 3 only).
It is: 342
2 x 2 x 3 x 7 = 84 2 x 3 x 3 x 3 x 7 = 378 2 x 2 x 3 x 3 x 3 x 7 = 756, the LCM