There is an infinity of such numbers: 8000000 is one, for example.
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4
It is: 4+16 = 20
No number has the multiples of 1, 2, 4, 5, 8, 10, 16, 20, 40, 80, but the number 80 (and all its multiples: 160, 240, 320, 400, ...) has them all as FACTORS.
{12, 14, 16, 18} is.
To find 20 percent of a number, multiply the number by 0.2. In this instance, 0.2 x 16 = 3.2. Therefore, 20 percent of 16 is equal to 3.2.