20811000

素因数分解:

$2^3\times 3^1\times 5^3\times 7^1\times {\mathrm{991}}^1$

素因数の和:1022

約数の個数: 128

約数和(自身を含む): 74280960

約数和(自身を除く): 53469960

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 25, 28, 30, 35, 40, 42, 50, 56, 60, 70, 75, 84, 100, 105, 120, 125, 140, 150, 168, 175, 200, 210, 250, 280, 300, 350, 375, 420, 500, 525, 600, 700, 750, 840, 875, 991, 1000, 1050, 1400, 1500, 1750, 1982, 2100, 2625, 2973, 3000, 3500, 3964, 4200, 4955, 5250, 5946, 6937, 7000, 7928, 9910, 10500, 11892, 13874, 14865, 19820, 20811, 21000, 23784, 24775, 27748, 29730, 34685, 39640, 41622, 49550, 55496, 59460, 69370, 74325, 83244, 99100, 104055, 118920, 123875, 138740, 148650, 166488, 173425, 198200, 208110, 247750, 277480, 297300, 346850, 371625, 416220, 495500, 520275, 594600, 693700, 743250, 832440, 867125, 991000, 1040550, 1387400, 1486500, 1734250, 2081100, 2601375, 2973000, 3468500, 4162200, 5202750, 6937000, 10405500, 20811000]

約数ペア:

[(1, 20811000), (2, 10405500), (3, 6937000), (4, 5202750), (5, 4162200), (6, 3468500), (7, 2973000), (8, 2601375), (10, 2081100), (12, 1734250), (14, 1486500), (15, 1387400), (20, 1040550), (21, 991000), (24, 867125), (25, 832440), (28, 743250), (30, 693700), (35, 594600), (40, 520275), (42, 495500), (50, 416220), (56, 371625), (60, 346850), (70, 297300), (75, 277480), (84, 247750), (100, 208110), (105, 198200), (120, 173425), (125, 166488), (140, 148650), (150, 138740), (168, 123875), (175, 118920), (200, 104055), (210, 99100), (250, 83244), (280, 74325), (300, 69370), (350, 59460), (375, 55496), (420, 49550), (500, 41622), (525, 39640), (600, 34685), (700, 29730), (750, 27748), (840, 24775), (875, 23784), (991, 21000), (1000, 20811), (1050, 19820), (1400, 14865), (1500, 13874), (1750, 11892), (1982, 10500), (2100, 9910), (2625, 7928), (2973, 7000), (3000, 6937), (3500, 5946), (3964, 5250), (4200, 4955)]