21121800

素因数分解:

$2^3\times 3^1\times 5^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{107}}^1$

素因数の和:180

約数の個数: 192

約数和(自身を含む): 77137920

約数和(自身を除く): 56016120

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 25, 28, 30, 35, 40, 42, 47, 50, 56, 60, 70, 75, 84, 94, 100, 105, 107, 120, 140, 141, 150, 168, 175, 188, 200, 210, 214, 235, 280, 282, 300, 321, 329, 350, 376, 420, 428, 470, 525, 535, 564, 600, 642, 658, 700, 705, 749, 840, 856, 940, 987, 1050, 1070, 1128, 1175, 1284, 1316, 1400, 1410, 1498, 1605, 1645, 1880, 1974, 2100, 2140, 2247, 2350, 2568, 2632, 2675, 2820, 2996, 3210, 3290, 3525, 3745, 3948, 4200, 4280, 4494, 4700, 4935, 5029, 5350, 5640, 5992, 6420, 6580, 7050, 7490, 7896, 8025, 8225, 8988, 9400, 9870, 10058, 10700, 11235, 12840, 13160, 14100, 14980, 15087, 16050, 16450, 17976, 18725, 19740, 20116, 21400, 22470, 24675, 25145, 28200, 29960, 30174, 32100, 32900, 35203, 37450, 39480, 40232, 44940, 49350, 50290, 56175, 60348, 64200, 65800, 70406, 74900, 75435, 89880, 98700, 100580, 105609, 112350, 120696, 125725, 140812, 149800, 150870, 176015, 197400, 201160, 211218, 224700, 251450, 281624, 301740, 352030, 377175, 422436, 449400, 502900, 528045, 603480, 704060, 754350, 844872, 880075, 1005800, 1056090, 1408120, 1508700, 1760150, 2112180, 2640225, 3017400, 3520300, 4224360, 5280450, 7040600, 10560900, 21121800]

約数ペア:

[(1, 21121800), (2, 10560900), (3, 7040600), (4, 5280450), (5, 4224360), (6, 3520300), (7, 3017400), (8, 2640225), (10, 2112180), (12, 1760150), (14, 1508700), (15, 1408120), (20, 1056090), (21, 1005800), (24, 880075), (25, 844872), (28, 754350), (30, 704060), (35, 603480), (40, 528045), (42, 502900), (47, 449400), (50, 422436), (56, 377175), (60, 352030), (70, 301740), (75, 281624), (84, 251450), (94, 224700), (100, 211218), (105, 201160), (107, 197400), (120, 176015), (140, 150870), (141, 149800), (150, 140812), (168, 125725), (175, 120696), (188, 112350), (200, 105609), (210, 100580), (214, 98700), (235, 89880), (280, 75435), (282, 74900), (300, 70406), (321, 65800), (329, 64200), (350, 60348), (376, 56175), (420, 50290), (428, 49350), (470, 44940), (525, 40232), (535, 39480), (564, 37450), (600, 35203), (642, 32900), (658, 32100), (700, 30174), (705, 29960), (749, 28200), (840, 25145), (856, 24675), (940, 22470), (987, 21400), (1050, 20116), (1070, 19740), (1128, 18725), (1175, 17976), (1284, 16450), (1316, 16050), (1400, 15087), (1410, 14980), (1498, 14100), (1605, 13160), (1645, 12840), (1880, 11235), (1974, 10700), (2100, 10058), (2140, 9870), (2247, 9400), (2350, 8988), (2568, 8225), (2632, 8025), (2675, 7896), (2820, 7490), (2996, 7050), (3210, 6580), (3290, 6420), (3525, 5992), (3745, 5640), (3948, 5350), (4200, 5029), (4280, 4935), (4494, 4700)]