81979520

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{631}}^1$

素因数の和:686

約数の個数: 128

約数和(自身を含む): 232070400

約数和(自身を除く): 150090880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 29, 32, 35, 40, 56, 58, 64, 70, 80, 112, 116, 128, 140, 145, 160, 203, 224, 232, 280, 290, 320, 406, 448, 464, 560, 580, 631, 640, 812, 896, 928, 1015, 1120, 1160, 1262, 1624, 1856, 2030, 2240, 2320, 2524, 3155, 3248, 3712, 4060, 4417, 4480, 4640, 5048, 6310, 6496, 8120, 8834, 9280, 10096, 12620, 12992, 16240, 17668, 18299, 18560, 20192, 22085, 25240, 25984, 32480, 35336, 36598, 40384, 44170, 50480, 64960, 70672, 73196, 80768, 88340, 91495, 100960, 128093, 129920, 141344, 146392, 176680, 182990, 201920, 256186, 282688, 292784, 353360, 365980, 403840, 512372, 565376, 585568, 640465, 706720, 731960, 1024744, 1171136, 1280930, 1413440, 1463920, 2049488, 2342272, 2561860, 2826880, 2927840, 4098976, 5123720, 5855680, 8197952, 10247440, 11711360, 16395904, 20494880, 40989760, 81979520]

約数ペア:

[(1, 81979520), (2, 40989760), (4, 20494880), (5, 16395904), (7, 11711360), (8, 10247440), (10, 8197952), (14, 5855680), (16, 5123720), (20, 4098976), (28, 2927840), (29, 2826880), (32, 2561860), (35, 2342272), (40, 2049488), (56, 1463920), (58, 1413440), (64, 1280930), (70, 1171136), (80, 1024744), (112, 731960), (116, 706720), (128, 640465), (140, 585568), (145, 565376), (160, 512372), (203, 403840), (224, 365980), (232, 353360), (280, 292784), (290, 282688), (320, 256186), (406, 201920), (448, 182990), (464, 176680), (560, 146392), (580, 141344), (631, 129920), (640, 128093), (812, 100960), (896, 91495), (928, 88340), (1015, 80768), (1120, 73196), (1160, 70672), (1262, 64960), (1624, 50480), (1856, 44170), (2030, 40384), (2240, 36598), (2320, 35336), (2524, 32480), (3155, 25984), (3248, 25240), (3712, 22085), (4060, 20192), (4417, 18560), (4480, 18299), (4640, 17668), (5048, 16240), (6310, 12992), (6496, 12620), (8120, 10096), (8834, 9280)]