21891520

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{337}}^1$

素因数の和:390

約数の個数: 112

約数和(自身を含む): 61813440

約数和(自身を除く): 39921920

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, 140, 145, 160, 203, 224, 232, 280, 290, 320, 337, 406, 448, 464, 560, 580, 674, 812, 928, 1015, 1120, 1160, 1348, 1624, 1685, 1856, 2030, 2240, 2320, 2359, 2696, 3248, 3370, 4060, 4640, 4718, 5392, 6496, 6740, 8120, 9280, 9436, 9773, 10784, 11795, 12992, 13480, 16240, 18872, 19546, 21568, 23590, 26960, 32480, 37744, 39092, 47180, 48865, 53920, 64960, 68411, 75488, 78184, 94360, 97730, 107840, 136822, 150976, 156368, 188720, 195460, 273644, 312736, 342055, 377440, 390920, 547288, 625472, 684110, 754880, 781840, 1094576, 1368220, 1563680, 2189152, 2736440, 3127360, 4378304, 5472880, 10945760, 21891520]

約数ペア:

[(1, 21891520), (2, 10945760), (4, 5472880), (5, 4378304), (7, 3127360), (8, 2736440), (10, 2189152), (14, 1563680), (16, 1368220), (20, 1094576), (28, 781840), (29, 754880), (32, 684110), (35, 625472), (40, 547288), (56, 390920), (58, 377440), (64, 342055), (70, 312736), (80, 273644), (112, 195460), (116, 188720), (140, 156368), (145, 150976), (160, 136822), (203, 107840), (224, 97730), (232, 94360), (280, 78184), (290, 75488), (320, 68411), (337, 64960), (406, 53920), (448, 48865), (464, 47180), (560, 39092), (580, 37744), (674, 32480), (812, 26960), (928, 23590), (1015, 21568), (1120, 19546), (1160, 18872), (1348, 16240), (1624, 13480), (1685, 12992), (1856, 11795), (2030, 10784), (2240, 9773), (2320, 9436), (2359, 9280), (2696, 8120), (3248, 6740), (3370, 6496), (4060, 5392), (4640, 4718)]