20781623520

素因数分解:

$2^5\times 3^3\times 5^1\times 7^1\times {\mathrm{687223}}^1$

素因数の和:687254

約数の個数: 192

約数和(自身を含む): 83126615040

約数和(自身を除く): 62344991520

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 27, 28, 30, 32, 35, 36, 40, 42, 45, 48, 54, 56, 60, 63, 70, 72, 80, 84, 90, 96, 105, 108, 112, 120, 126, 135, 140, 144, 160, 168, 180, 189, 210, 216, 224, 240, 252, 270, 280, 288, 315, 336, 360, 378, 420, 432, 480, 504, 540, 560, 630, 672, 720, 756, 840, 864, 945, 1008, 1080, 1120, 1260, 1440, 1512, 1680, 1890, 2016, 2160, 2520, 3024, 3360, 3780, 4320, 5040, 6048, 7560, 10080, 15120, 30240, 687223, 1374446, 2061669, 2748892, 3436115, 4123338, 4810561, 5497784, 6185007, 6872230, 8246676, 9621122, 10308345, 10995568, 12370014, 13744460, 14431683, 16493352, 18555021, 19242244, 20616690, 21991136, 24052805, 24740028, 27488920, 28863366, 30925035, 32986704, 37110042, 38484488, 41233380, 43295049, 48105610, 49480056, 54977840, 57726732, 61850070, 65973408, 72158415, 74220084, 76968976, 82466760, 86590098, 92775105, 96211220, 98960112, 109955680, 115453464, 123700140, 129885147, 144316830, 148440168, 153937952, 164933520, 173180196, 185550210, 192422440, 197920224, 216475245, 230906928, 247400280, 259770294, 288633660, 296880336, 329867040, 346360392, 371100420, 384844880, 432950490, 461813856, 494800560, 519540588, 577267320, 593760672, 649425735, 692720784, 742200840, 769689760, 865900980, 989601120, 1039081176, 1154534640, 1298851470, 1385441568, 1484401680, 1731801960, 2078162352, 2309069280, 2597702940, 2968803360, 3463603920, 4156324704, 5195405880, 6927207840, 10390811760, 20781623520]

約数ペア:

[(1, 20781623520), (2, 10390811760), (3, 6927207840), (4, 5195405880), (5, 4156324704), (6, 3463603920), (7, 2968803360), (8, 2597702940), (9, 2309069280), (10, 2078162352), (12, 1731801960), (14, 1484401680), (15, 1385441568), (16, 1298851470), (18, 1154534640), (20, 1039081176), (21, 989601120), (24, 865900980), (27, 769689760), (28, 742200840), (30, 692720784), (32, 649425735), (35, 593760672), (36, 577267320), (40, 519540588), (42, 494800560), (45, 461813856), (48, 432950490), (54, 384844880), (56, 371100420), (60, 346360392), (63, 329867040), (70, 296880336), (72, 288633660), (80, 259770294), (84, 247400280), (90, 230906928), (96, 216475245), (105, 197920224), (108, 192422440), (112, 185550210), (120, 173180196), (126, 164933520), (135, 153937952), (140, 148440168), (144, 144316830), (160, 129885147), (168, 123700140), (180, 115453464), (189, 109955680), (210, 98960112), (216, 96211220), (224, 92775105), (240, 86590098), (252, 82466760), (270, 76968976), (280, 74220084), (288, 72158415), (315, 65973408), (336, 61850070), (360, 57726732), (378, 54977840), (420, 49480056), (432, 48105610), (480, 43295049), (504, 41233380), (540, 38484488), (560, 37110042), (630, 32986704), (672, 30925035), (720, 28863366), (756, 27488920), (840, 24740028), (864, 24052805), (945, 21991136), (1008, 20616690), (1080, 19242244), (1120, 18555021), (1260, 16493352), (1440, 14431683), (1512, 13744460), (1680, 12370014), (1890, 10995568), (2016, 10308345), (2160, 9621122), (2520, 8246676), (3024, 6872230), (3360, 6185007), (3780, 5497784), (4320, 4810561), (5040, 4123338), (6048, 3436115), (7560, 2748892), (10080, 2061669), (15120, 1374446), (30240, 687223)]