20782876160

素因数分解:

$2^9\times 5^1\times {\mathrm{31}}^1\times {\mathrm{261881}}^1$

素因数の和:261935

約数の個数: 80

約数和(自身を含む): 51437814912

約数和(自身を除く): 30654938752

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 512, 620, 640, 992, 1240, 1280, 1984, 2480, 2560, 3968, 4960, 7936, 9920, 15872, 19840, 39680, 79360, 261881, 523762, 1047524, 1309405, 2095048, 2618810, 4190096, 5237620, 8118311, 8380192, 10475240, 16236622, 16760384, 20950480, 32473244, 33520768, 40591555, 41900960, 64946488, 67041536, 81183110, 83801920, 129892976, 134083072, 162366220, 167603840, 259785952, 324732440, 335207680, 519571904, 649464880, 670415360, 1039143808, 1298929760, 2078287616, 2597859520, 4156575232, 5195719040, 10391438080, 20782876160]

約数ペア:

[(1, 20782876160), (2, 10391438080), (4, 5195719040), (5, 4156575232), (8, 2597859520), (10, 2078287616), (16, 1298929760), (20, 1039143808), (31, 670415360), (32, 649464880), (40, 519571904), (62, 335207680), (64, 324732440), (80, 259785952), (124, 167603840), (128, 162366220), (155, 134083072), (160, 129892976), (248, 83801920), (256, 81183110), (310, 67041536), (320, 64946488), (496, 41900960), (512, 40591555), (620, 33520768), (640, 32473244), (992, 20950480), (1240, 16760384), (1280, 16236622), (1984, 10475240), (2480, 8380192), (2560, 8118311), (3968, 5237620), (4960, 4190096), (7936, 2618810), (9920, 2095048), (15872, 1309405), (19840, 1047524), (39680, 523762), (79360, 261881)]