640262880

素因数分解:

$2^5\times 3^4\times 5^1\times {\mathrm{127}}^1\times {\mathrm{389}}^1$

素因数の和:543

約数の個数: 240

約数和(自身を含む): 2283240960

約数和(自身を除く): 1642978080

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 32, 36, 40, 45, 48, 54, 60, 72, 80, 81, 90, 96, 108, 120, 127, 135, 144, 160, 162, 180, 216, 240, 254, 270, 288, 324, 360, 381, 389, 405, 432, 480, 508, 540, 635, 648, 720, 762, 778, 810, 864, 1016, 1080, 1143, 1167, 1270, 1296, 1440, 1524, 1556, 1620, 1905, 1945, 2032, 2160, 2286, 2334, 2540, 2592, 3048, 3112, 3240, 3429, 3501, 3810, 3890, 4064, 4320, 4572, 4668, 5080, 5715, 5835, 6096, 6224, 6480, 6858, 7002, 7620, 7780, 9144, 9336, 10160, 10287, 10503, 11430, 11670, 12192, 12448, 12960, 13716, 14004, 15240, 15560, 17145, 17505, 18288, 18672, 20320, 20574, 21006, 22860, 23340, 27432, 28008, 30480, 31120, 31509, 34290, 35010, 36576, 37344, 41148, 42012, 45720, 46680, 49403, 51435, 52515, 54864, 56016, 60960, 62240, 63018, 68580, 70020, 82296, 84024, 91440, 93360, 98806, 102870, 105030, 109728, 112032, 126036, 137160, 140040, 148209, 157545, 164592, 168048, 182880, 186720, 197612, 205740, 210060, 247015, 252072, 274320, 280080, 296418, 315090, 329184, 336096, 395224, 411480, 420120, 444627, 494030, 504144, 548640, 560160, 592836, 630180, 741045, 790448, 822960, 840240, 889254, 988060, 1008288, 1185672, 1260360, 1333881, 1482090, 1580896, 1645920, 1680480, 1778508, 1976120, 2223135, 2371344, 2520720, 2667762, 2964180, 3557016, 3952240, 4001643, 4446270, 4742688, 5041440, 5335524, 5928360, 6669405, 7114032, 7904480, 8003286, 8892540, 10671048, 11856720, 13338810, 14228064, 16006572, 17785080, 20008215, 21342096, 23713440, 26677620, 32013144, 35570160, 40016430, 42684192, 53355240, 64026288, 71140320, 80032860, 106710480, 128052576, 160065720, 213420960, 320131440, 640262880]

約数ペア:

[(1, 640262880), (2, 320131440), (3, 213420960), (4, 160065720), (5, 128052576), (6, 106710480), (8, 80032860), (9, 71140320), (10, 64026288), (12, 53355240), (15, 42684192), (16, 40016430), (18, 35570160), (20, 32013144), (24, 26677620), (27, 23713440), (30, 21342096), (32, 20008215), (36, 17785080), (40, 16006572), (45, 14228064), (48, 13338810), (54, 11856720), (60, 10671048), (72, 8892540), (80, 8003286), (81, 7904480), (90, 7114032), (96, 6669405), (108, 5928360), (120, 5335524), (127, 5041440), (135, 4742688), (144, 4446270), (160, 4001643), (162, 3952240), (180, 3557016), (216, 2964180), (240, 2667762), (254, 2520720), (270, 2371344), (288, 2223135), (324, 1976120), (360, 1778508), (381, 1680480), (389, 1645920), (405, 1580896), (432, 1482090), (480, 1333881), (508, 1260360), (540, 1185672), (635, 1008288), (648, 988060), (720, 889254), (762, 840240), (778, 822960), (810, 790448), (864, 741045), (1016, 630180), (1080, 592836), (1143, 560160), (1167, 548640), (1270, 504144), (1296, 494030), (1440, 444627), (1524, 420120), (1556, 411480), (1620, 395224), (1905, 336096), (1945, 329184), (2032, 315090), (2160, 296418), (2286, 280080), (2334, 274320), (2540, 252072), (2592, 247015), (3048, 210060), (3112, 205740), (3240, 197612), (3429, 186720), (3501, 182880), (3810, 168048), (3890, 164592), (4064, 157545), (4320, 148209), (4572, 140040), (4668, 137160), (5080, 126036), (5715, 112032), (5835, 109728), (6096, 105030), (6224, 102870), (6480, 98806), (6858, 93360), (7002, 91440), (7620, 84024), (7780, 82296), (9144, 70020), (9336, 68580), (10160, 63018), (10287, 62240), (10503, 60960), (11430, 56016), (11670, 54864), (12192, 52515), (12448, 51435), (12960, 49403), (13716, 46680), (14004, 45720), (15240, 42012), (15560, 41148), (17145, 37344), (17505, 36576), (18288, 35010), (18672, 34290), (20320, 31509), (20574, 31120), (21006, 30480), (22860, 28008), (23340, 27432)]