81521440

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{509}}^1$

素因数の和:555

約数の個数: 192

約数和(自身を含む): 259096320

約数和(自身を除く): 177574880

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 20, 22, 26, 28, 32, 35, 40, 44, 52, 55, 56, 65, 70, 77, 80, 88, 91, 104, 110, 112, 130, 140, 143, 154, 160, 176, 182, 208, 220, 224, 260, 280, 286, 308, 352, 364, 385, 416, 440, 455, 509, 520, 560, 572, 616, 715, 728, 770, 880, 910, 1001, 1018, 1040, 1120, 1144, 1232, 1430, 1456, 1540, 1760, 1820, 2002, 2036, 2080, 2288, 2464, 2545, 2860, 2912, 3080, 3563, 3640, 4004, 4072, 4576, 5005, 5090, 5599, 5720, 6160, 6617, 7126, 7280, 8008, 8144, 10010, 10180, 11198, 11440, 12320, 13234, 14252, 14560, 16016, 16288, 17815, 20020, 20360, 22396, 22880, 26468, 27995, 28504, 32032, 33085, 35630, 39193, 40040, 40720, 44792, 46319, 52936, 55990, 57008, 66170, 71260, 72787, 78386, 80080, 81440, 89584, 92638, 105872, 111980, 114016, 132340, 142520, 145574, 156772, 160160, 179168, 185276, 195965, 211744, 223960, 231595, 264680, 285040, 291148, 313544, 363935, 370552, 391930, 447920, 463190, 509509, 529360, 570080, 582296, 627088, 727870, 741104, 783860, 895840, 926380, 1019018, 1058720, 1164592, 1254176, 1455740, 1482208, 1567720, 1852760, 2038036, 2329184, 2547545, 2911480, 3135440, 3705520, 4076072, 5095090, 5822960, 6270880, 7411040, 8152144, 10190180, 11645920, 16304288, 20380360, 40760720, 81521440]

約数ペア:

[(1, 81521440), (2, 40760720), (4, 20380360), (5, 16304288), (7, 11645920), (8, 10190180), (10, 8152144), (11, 7411040), (13, 6270880), (14, 5822960), (16, 5095090), (20, 4076072), (22, 3705520), (26, 3135440), (28, 2911480), (32, 2547545), (35, 2329184), (40, 2038036), (44, 1852760), (52, 1567720), (55, 1482208), (56, 1455740), (65, 1254176), (70, 1164592), (77, 1058720), (80, 1019018), (88, 926380), (91, 895840), (104, 783860), (110, 741104), (112, 727870), (130, 627088), (140, 582296), (143, 570080), (154, 529360), (160, 509509), (176, 463190), (182, 447920), (208, 391930), (220, 370552), (224, 363935), (260, 313544), (280, 291148), (286, 285040), (308, 264680), (352, 231595), (364, 223960), (385, 211744), (416, 195965), (440, 185276), (455, 179168), (509, 160160), (520, 156772), (560, 145574), (572, 142520), (616, 132340), (715, 114016), (728, 111980), (770, 105872), (880, 92638), (910, 89584), (1001, 81440), (1018, 80080), (1040, 78386), (1120, 72787), (1144, 71260), (1232, 66170), (1430, 57008), (1456, 55990), (1540, 52936), (1760, 46319), (1820, 44792), (2002, 40720), (2036, 40040), (2080, 39193), (2288, 35630), (2464, 33085), (2545, 32032), (2860, 28504), (2912, 27995), (3080, 26468), (3563, 22880), (3640, 22396), (4004, 20360), (4072, 20020), (4576, 17815), (5005, 16288), (5090, 16016), (5599, 14560), (5720, 14252), (6160, 13234), (6617, 12320), (7126, 11440), (7280, 11198), (8008, 10180), (8144, 10010)]