21481320

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{239}}^1$

素因数の和:367

約数の個数: 128

約数和(自身を含む): 74649600

約数和(自身を除く): 53168280

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, 107, 120, 140, 168, 210, 214, 239, 280, 321, 420, 428, 478, 535, 642, 717, 749, 840, 856, 956, 1070, 1195, 1284, 1434, 1498, 1605, 1673, 1912, 2140, 2247, 2390, 2568, 2868, 2996, 3210, 3346, 3585, 3745, 4280, 4494, 4780, 5019, 5736, 5992, 6420, 6692, 7170, 7490, 8365, 8988, 9560, 10038, 11235, 12840, 13384, 14340, 14980, 16730, 17976, 20076, 22470, 25095, 25573, 28680, 29960, 33460, 40152, 44940, 50190, 51146, 66920, 76719, 89880, 100380, 102292, 127865, 153438, 179011, 200760, 204584, 255730, 306876, 358022, 383595, 511460, 537033, 613752, 716044, 767190, 895055, 1022920, 1074066, 1432088, 1534380, 1790110, 2148132, 2685165, 3068760, 3580220, 4296264, 5370330, 7160440, 10740660, 21481320]

約数ペア:

[(1, 21481320), (2, 10740660), (3, 7160440), (4, 5370330), (5, 4296264), (6, 3580220), (7, 3068760), (8, 2685165), (10, 2148132), (12, 1790110), (14, 1534380), (15, 1432088), (20, 1074066), (21, 1022920), (24, 895055), (28, 767190), (30, 716044), (35, 613752), (40, 537033), (42, 511460), (56, 383595), (60, 358022), (70, 306876), (84, 255730), (105, 204584), (107, 200760), (120, 179011), (140, 153438), (168, 127865), (210, 102292), (214, 100380), (239, 89880), (280, 76719), (321, 66920), (420, 51146), (428, 50190), (478, 44940), (535, 40152), (642, 33460), (717, 29960), (749, 28680), (840, 25573), (856, 25095), (956, 22470), (1070, 20076), (1195, 17976), (1284, 16730), (1434, 14980), (1498, 14340), (1605, 13384), (1673, 12840), (1912, 11235), (2140, 10038), (2247, 9560), (2390, 8988), (2568, 8365), (2868, 7490), (2996, 7170), (3210, 6692), (3346, 6420), (3585, 5992), (3745, 5736), (4280, 5019), (4494, 4780)]