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A072498
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n is not equal to the product of the k smallest divisors of n for any k.
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2
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4, 9, 12, 16, 18, 20, 25, 28, 32, 36, 42, 44, 45, 48, 49, 50, 52, 54, 60, 63, 66, 68, 72, 75, 76, 78, 80, 81, 84, 88, 90, 92, 96, 98, 99, 100, 102, 104, 108, 110, 112, 114, 116, 117, 121, 124, 126, 128, 130, 132, 136, 138, 140, 147, 148, 150, 152, 153, 156, 160, 162
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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COMMENTS
| Positive integers not include in A072510. Sequence include all prime squares.
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EXAMPLE
| Divisors of 384 are 1,2,3,4,6,8,12,16,24,32,48,64,96,128,192,384. Partial products are: 1=1, 1*2=2, 1*2*3=6, 1*2*3*4=24, 1*2*3*4*6=144, 1*2*3*4*6*8=1152 and so 384 (144<384<1152) is not in A072510.
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CROSSREFS
| Cf. A072510.
Sequence in context: A010386 A094120 A066423 * A162643 A072587 A162645
Adjacent sequences: A072495 A072496 A072497 * A072499 A072500 A072501
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KEYWORD
| nonn
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AUTHOR
| Vladimir Baltic (baltic(AT)matf.bg.ac.yu), Aug 03 2002
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