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A033870
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Divisors = 1 (mod 4) of Descartes's 198585576189.
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4
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1, 9, 13, 21, 33, 49, 57, 61, 77, 117, 121, 133, 169, 209, 273, 361, 429, 441, 549, 637, 693, 741, 793, 1001, 1089, 1197, 1281, 1521, 1573, 1617, 1729, 1881, 2013, 2541, 2717, 2793, 2989, 3249, 3477, 3549, 4389, 4693, 4697, 5577, 5733, 5929
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OFFSET
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1,2
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COMMENTS
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The number 198585576189 has 486 divisors, 246 of which are congruent to 1 modulo 4. - M. F. Hasler, Feb 17 2017
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LINKS
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EXAMPLE
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198585576189 = 3^2 * 7^2 * 11^2 * 13^2 * 19^2 * 61.
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PROG
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(PARI) lista() = {fordiv(198585576189, d, if (d % 4 == 1, print1(d, ", "))); } \\ Michel Marcus, Jul 14 2013
(PARI) select(d->d%4==1, divisors(198585576189)) \\ M. F. Hasler, Feb 17 2017
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CROSSREFS
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KEYWORD
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easy,fini,nonn,full
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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