| SPECIAL MULTIPERFECT NUMBER SEARCH |
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| Numbers n for
which sigma(n)/n = k + X with integer k and rational X |
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| Valid in range <10.000.000
unless otherwise noted. |
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| No. |
sigma(n)/n |
n |
Registered in The OEIS database: |
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| Z01 |
k+1/4 |
40 (k=2) |
224 (k=2) |
360 (k=3) |
2016 (k=3) |
174592 (k=2) |
524160 (k=4) |
1571328 (k=3) |
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A218404 |
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| Z02 |
k+3/4 |
47616 (k=2) |
293760 (k=3) |
1782144 (k=3) |
3485664 (k=3) |
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A218405 |
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| Z03 |
k+1/5 |
420 (k=3) |
7440 (k=3) |
8190 (k=3) |
18600 (k=3) |
121920 (k=3) |
131040 (k=4) |
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A218406 |
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| Z04 |
k+2/5 |
30
(k=2) |
140 (k=2) |
2480 (k=2) |
6200 (k=2) |
40640 (k=2) |
297600 (k=3) |
997920 (k=4) |
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A218407 |
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| Z05 |
k+3/5 |
90
(k=2) |
3360 (k=3) |
2618880 (k=3) |
5059200 (k=3) |
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A218408 |
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| Z06 |
k+4/5 |
60
(k=2) |
1170 (k=2) |
114660 (k=3) |
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A218427 |
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| Z07 |
k+1/6 |
18
(k=2) |
22932 (k=3) |
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k+5/6 |
- |
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| Z08 |
k+1/7 |
56
(k=2) |
3724 (k=2) |
333312 (k=3) |
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A218428 |
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| Z09 |
k+2/7 |
42
(k=2) |
3472 (k=2) |
56896 (k=2) |
2056320 (k=4) |
4021920 (k=4) |
4357080 (k=4) |
6420960 (k=4) |
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A218409 |
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| Z10 |
k+3/7 |
840 (k=3) |
55860 (k=3) |
1089270 (k=3) |
3666432 (k=3) |
proved up to 100.000.000 |
A218410 |
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| Z11 |
k+4/7 |
280 (k=2) |
18620 (k=2) |
411264 (k=3) |
804384 (k=3) |
871416 (k=3) |
1222144 (k=2) |
1284192 (k=3) |
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A218411 |
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| Z12 |
k+5/7 |
588 (k=2) |
2520 (k=3) |
11466 (k=2) |
167580 (k=3) |
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A218412 |
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| Z13 |
k+6/7 |
168 (k=2) |
11172 (k=2) |
217854 (k=2) |
228480 (k=3) |
446880 (k=3) |
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A218413 |
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| Z14 |
k+1/8 |
58752 (k=3) |
9694080 (k=4) |
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| Z15 |
k+3/8 |
32640 (k=3) |
4840192 (k=2) |
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| Z16 |
k+5/8 |
96 (k=2) |
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| Z17 |
k+7/8 |
760320 (k=3) |
1468800 (k=3) |
4612608 (k=3) |
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A218429 |
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| Z18 |
k+1/9 |
540 (k=3) |
3276 (k=3) |
58032 (k=3) |
950976 (k=3) |
1862190 (k=3) |
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A218414 |
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| Z19 |
k+2/9 |
54 (k=2) |
2744280 (k=4) |
6191640 (k=4) |
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A218430 |
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| Z20 |
k+3/9 (k+1/3) |
12
(k=2) |
234 (k=2) |
1080 (k=3) |
6048 (k=3) |
6552 (k=3) |
435708 (k=3) |
4713984 (k=3) |
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A160320 by J.C.Klein |
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| Z21 |
k+4/9 |
1782 (k=2) |
2160 (k=3) |
5400 (k=3) |
13104 (k=3) |
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A218415 |
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| Z22 |
k+5/9 |
3780 (k=3) |
66960 (k=3) |
167400 (k=3) |
406224 (k=3) |
1097280 (k=3) |
6656832 (k=3) |
13035330 (k=3) |
29410290 (k=3) |
A218416 |
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| Z23 |
k+7/9 |
216 (k=2) |
2678400 (k=3) |
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A218417 |
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| Z24 |
k+8/9 |
252 (k=2) |
4464 (k=2) |
73152 (k=2) |
7448760 (k=3) |
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A218418 |
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<-- back to main page "www.stretko.tk"
Author:
z
(punkt)
červenka (sabáčka)
centrum
(punkt)
cz
Published: 28. 10. 2012
Copyright © 2012 Zdeněk Červenka
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