257565280

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:213

約数の個数: 192

約数和(自身を含む): 731566080

約数和(自身を除く): 474000800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 41, 56, 70, 71, 79, 80, 82, 112, 140, 142, 158, 160, 164, 205, 224, 280, 284, 287, 316, 328, 355, 395, 410, 497, 553, 560, 568, 574, 632, 656, 710, 790, 820, 994, 1106, 1120, 1136, 1148, 1264, 1312, 1420, 1435, 1580, 1640, 1988, 2212, 2272, 2296, 2485, 2528, 2765, 2840, 2870, 2911, 3160, 3239, 3280, 3976, 4424, 4592, 4970, 5530, 5609, 5680, 5740, 5822, 6320, 6478, 6560, 7952, 8848, 9184, 9940, 11060, 11218, 11360, 11480, 11644, 12640, 12956, 14555, 15904, 16195, 17696, 19880, 20377, 22120, 22436, 22673, 22960, 23288, 25912, 28045, 29110, 32390, 39263, 39760, 40754, 44240, 44872, 45346, 45920, 46576, 51824, 56090, 58220, 64780, 78526, 79520, 81508, 88480, 89744, 90692, 93152, 101885, 103648, 112180, 113365, 116440, 129560, 157052, 163016, 179488, 181384, 196315, 203770, 224360, 226730, 229969, 232880, 259120, 314104, 326032, 362768, 392630, 407540, 448720, 453460, 459938, 465760, 518240, 628208, 652064, 725536, 785260, 815080, 897440, 906920, 919876, 1149845, 1256416, 1570520, 1609783, 1630160, 1813840, 1839752, 2299690, 3141040, 3219566, 3260320, 3627680, 3679504, 4599380, 6282080, 6439132, 7359008, 8048915, 9198760, 12878264, 16097830, 18397520, 25756528, 32195660, 36795040, 51513056, 64391320, 128782640, 257565280]

約数ペア:

[(1, 257565280), (2, 128782640), (4, 64391320), (5, 51513056), (7, 36795040), (8, 32195660), (10, 25756528), (14, 18397520), (16, 16097830), (20, 12878264), (28, 9198760), (32, 8048915), (35, 7359008), (40, 6439132), (41, 6282080), (56, 4599380), (70, 3679504), (71, 3627680), (79, 3260320), (80, 3219566), (82, 3141040), (112, 2299690), (140, 1839752), (142, 1813840), (158, 1630160), (160, 1609783), (164, 1570520), (205, 1256416), (224, 1149845), (280, 919876), (284, 906920), (287, 897440), (316, 815080), (328, 785260), (355, 725536), (395, 652064), (410, 628208), (497, 518240), (553, 465760), (560, 459938), (568, 453460), (574, 448720), (632, 407540), (656, 392630), (710, 362768), (790, 326032), (820, 314104), (994, 259120), (1106, 232880), (1120, 229969), (1136, 226730), (1148, 224360), (1264, 203770), (1312, 196315), (1420, 181384), (1435, 179488), (1580, 163016), (1640, 157052), (1988, 129560), (2212, 116440), (2272, 113365), (2296, 112180), (2485, 103648), (2528, 101885), (2765, 93152), (2840, 90692), (2870, 89744), (2911, 88480), (3160, 81508), (3239, 79520), (3280, 78526), (3976, 64780), (4424, 58220), (4592, 56090), (4970, 51824), (5530, 46576), (5609, 45920), (5680, 45346), (5740, 44872), (5822, 44240), (6320, 40754), (6478, 39760), (6560, 39263), (7952, 32390), (8848, 29110), (9184, 28045), (9940, 25912), (11060, 23288), (11218, 22960), (11360, 22673), (11480, 22436), (11644, 22120), (12640, 20377), (12956, 19880), (14555, 17696), (15904, 16195)]