257857320

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{1223}}^1$

素因数の和:1495

約数の個数: 128

約数和(自身を含む): 888330240

約数和(自身を除く): 630472920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 251, 280, 420, 502, 753, 840, 1004, 1223, 1255, 1506, 1757, 2008, 2446, 2510, 3012, 3514, 3669, 3765, 4892, 5020, 5271, 6024, 6115, 7028, 7338, 7530, 8561, 8785, 9784, 10040, 10542, 12230, 14056, 14676, 15060, 17122, 17570, 18345, 21084, 24460, 25683, 26355, 29352, 30120, 34244, 35140, 36690, 42168, 42805, 48920, 51366, 52710, 68488, 70280, 73380, 85610, 102732, 105420, 128415, 146760, 171220, 205464, 210840, 256830, 306973, 342440, 513660, 613946, 920919, 1027320, 1227892, 1534865, 1841838, 2148811, 2455784, 3069730, 3683676, 4297622, 4604595, 6139460, 6446433, 7367352, 8595244, 9209190, 10744055, 12278920, 12892866, 17190488, 18418380, 21488110, 25785732, 32232165, 36836760, 42976220, 51571464, 64464330, 85952440, 128928660, 257857320]

約数ペア:

[(1, 257857320), (2, 128928660), (3, 85952440), (4, 64464330), (5, 51571464), (6, 42976220), (7, 36836760), (8, 32232165), (10, 25785732), (12, 21488110), (14, 18418380), (15, 17190488), (20, 12892866), (21, 12278920), (24, 10744055), (28, 9209190), (30, 8595244), (35, 7367352), (40, 6446433), (42, 6139460), (56, 4604595), (60, 4297622), (70, 3683676), (84, 3069730), (105, 2455784), (120, 2148811), (140, 1841838), (168, 1534865), (210, 1227892), (251, 1027320), (280, 920919), (420, 613946), (502, 513660), (753, 342440), (840, 306973), (1004, 256830), (1223, 210840), (1255, 205464), (1506, 171220), (1757, 146760), (2008, 128415), (2446, 105420), (2510, 102732), (3012, 85610), (3514, 73380), (3669, 70280), (3765, 68488), (4892, 52710), (5020, 51366), (5271, 48920), (6024, 42805), (6115, 42168), (7028, 36690), (7338, 35140), (7530, 34244), (8561, 30120), (8785, 29352), (9784, 26355), (10040, 25683), (10542, 24460), (12230, 21084), (14056, 18345), (14676, 17570), (15060, 17122)]