81574857

素因数分解:

$3^5\times 7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1$

素因数の和:90

約数の個数: 144

約数和(自身を含む): 167311872

約数和(自身を除く): 85737015

約数列:

[1, 3, 7, 9, 13, 17, 21, 27, 31, 39, 49, 51, 63, 81, 91, 93, 117, 119, 147, 153, 189, 217, 221, 243, 273, 279, 351, 357, 403, 441, 459, 527, 567, 637, 651, 663, 819, 833, 837, 1053, 1071, 1209, 1323, 1377, 1519, 1547, 1581, 1701, 1911, 1953, 1989, 2457, 2499, 2511, 2821, 3159, 3213, 3627, 3689, 3969, 4131, 4557, 4641, 4743, 5733, 5859, 5967, 6851, 7371, 7497, 7533, 8463, 9639, 10829, 10881, 11067, 11907, 13671, 13923, 14229, 17199, 17577, 17901, 19747, 20553, 22113, 22491, 25389, 25823, 28917, 32487, 32643, 33201, 41013, 41769, 42687, 47957, 51597, 52731, 53703, 59241, 61659, 67473, 76167, 77469, 97461, 97929, 99603, 123039, 125307, 128061, 143871, 154791, 177723, 184977, 202419, 228501, 232407, 292383, 298809, 335699, 369117, 375921, 431613, 533169, 554931, 685503, 697221, 877149, 896427, 1007097, 1294839, 1599507, 1664793, 2091663, 2631447, 3021291, 3884517, 4798521, 6274989, 9063873, 11653551, 27191619, 81574857]

約数ペア:

[(1, 81574857), (3, 27191619), (7, 11653551), (9, 9063873), (13, 6274989), (17, 4798521), (21, 3884517), (27, 3021291), (31, 2631447), (39, 2091663), (49, 1664793), (51, 1599507), (63, 1294839), (81, 1007097), (91, 896427), (93, 877149), (117, 697221), (119, 685503), (147, 554931), (153, 533169), (189, 431613), (217, 375921), (221, 369117), (243, 335699), (273, 298809), (279, 292383), (351, 232407), (357, 228501), (403, 202419), (441, 184977), (459, 177723), (527, 154791), (567, 143871), (637, 128061), (651, 125307), (663, 123039), (819, 99603), (833, 97929), (837, 97461), (1053, 77469), (1071, 76167), (1209, 67473), (1323, 61659), (1377, 59241), (1519, 53703), (1547, 52731), (1581, 51597), (1701, 47957), (1911, 42687), (1953, 41769), (1989, 41013), (2457, 33201), (2499, 32643), (2511, 32487), (2821, 28917), (3159, 25823), (3213, 25389), (3627, 22491), (3689, 22113), (3969, 20553), (4131, 19747), (4557, 17901), (4641, 17577), (4743, 17199), (5733, 14229), (5859, 13923), (5967, 13671), (6851, 11907), (7371, 11067), (7497, 10881), (7533, 10829), (8463, 9639)]