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 A111073 Numbers n such that the sum of the smallest and largest prime factor of n divides n. 0
 4, 8, 16, 32, 64, 126, 128, 252, 256, 378, 390, 504, 512, 630, 756, 780, 798, 882, 1008, 1024, 1134, 1150, 1170, 1260, 1512, 1560, 1596, 1764, 1890, 1950, 2016, 2046, 2048, 2268, 2300, 2340, 2394, 2520, 2646, 2730, 2886, 3024, 3120, 3150, 3192, 3402, 3450 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE 126 = 2*3^2*7, with smallest and largest prime factors 2 and 7, sum = 9, and 126 is divisible by 9; so 126 is in the sequence. PROG (PARI) lista(n) = {for (i=2, n, fac = factor(i); s = fac[1, 1] + fac[matsize(fac)[1], 1]; if (i % s == 0, print1(i, ", ")); ); } \\ Michel Marcus, May 18 2013 CROSSREFS Sequence in context: A145108 A108569 A196875 * A005934 A085629 A046055 Adjacent sequences:  A111070 A111071 A111072 * A111074 A111075 A111076 KEYWORD easy,nonn AUTHOR Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Oct 10 2005 STATUS approved

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