20965581

素因数分解:

$3^3\times 7^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1$

素因数の和:112

約数の個数: 96

約数和(自身を含む): 41368320

約数和(自身を除く): 20402739

約数列:

[1, 3, 7, 9, 13, 21, 23, 27, 39, 49, 53, 63, 69, 91, 117, 147, 159, 161, 189, 207, 273, 299, 351, 371, 441, 477, 483, 621, 637, 689, 819, 897, 1113, 1127, 1219, 1323, 1431, 1449, 1911, 2067, 2093, 2457, 2597, 2691, 3339, 3381, 3657, 4347, 4823, 5733, 6201, 6279, 7791, 8073, 8533, 10017, 10143, 10971, 14469, 14651, 15847, 17199, 18603, 18837, 23373, 25599, 30429, 32913, 33761, 43407, 43953, 47541, 56511, 59731, 70119, 76797, 101283, 110929, 130221, 131859, 142623, 179193, 230391, 303849, 332787, 395577, 427869, 537579, 776503, 911547, 998361, 1612737, 2329509, 2995083, 6988527, 20965581]

約数ペア:

[(1, 20965581), (3, 6988527), (7, 2995083), (9, 2329509), (13, 1612737), (21, 998361), (23, 911547), (27, 776503), (39, 537579), (49, 427869), (53, 395577), (63, 332787), (69, 303849), (91, 230391), (117, 179193), (147, 142623), (159, 131859), (161, 130221), (189, 110929), (207, 101283), (273, 76797), (299, 70119), (351, 59731), (371, 56511), (441, 47541), (477, 43953), (483, 43407), (621, 33761), (637, 32913), (689, 30429), (819, 25599), (897, 23373), (1113, 18837), (1127, 18603), (1219, 17199), (1323, 15847), (1431, 14651), (1449, 14469), (1911, 10971), (2067, 10143), (2093, 10017), (2457, 8533), (2597, 8073), (2691, 7791), (3339, 6279), (3381, 6201), (3657, 5733), (4347, 4823)]