21181680

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1$

素因数の和:136

約数の個数: 240

約数和(自身を含む): 80161536

約数和(自身を除く): 58979856

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16, 18, 20, 24, 26, 30, 31, 36, 39, 40, 45, 48, 52, 60, 62, 65, 72, 73, 78, 80, 90, 93, 104, 117, 120, 124, 130, 144, 146, 155, 156, 180, 186, 195, 208, 219, 234, 240, 248, 260, 279, 292, 310, 312, 360, 365, 372, 390, 403, 438, 465, 468, 496, 520, 558, 584, 585, 620, 624, 657, 720, 730, 744, 780, 806, 876, 930, 936, 949, 1040, 1095, 1116, 1168, 1170, 1209, 1240, 1314, 1395, 1460, 1488, 1560, 1612, 1752, 1860, 1872, 1898, 2015, 2190, 2232, 2263, 2340, 2418, 2480, 2628, 2790, 2847, 2920, 3120, 3224, 3285, 3504, 3627, 3720, 3796, 4030, 4380, 4464, 4526, 4680, 4745, 4836, 5256, 5580, 5694, 5840, 6045, 6448, 6570, 6789, 7254, 7440, 7592, 8060, 8541, 8760, 9052, 9360, 9490, 9672, 10512, 11160, 11315, 11388, 12090, 13140, 13578, 14235, 14508, 15184, 16120, 17082, 17520, 18104, 18135, 18980, 19344, 20367, 22320, 22630, 22776, 24180, 26280, 27156, 28470, 29016, 29419, 32240, 33945, 34164, 36208, 36270, 37960, 40734, 42705, 45260, 45552, 48360, 52560, 54312, 56940, 58032, 58838, 67890, 68328, 72540, 75920, 81468, 85410, 88257, 90520, 96720, 101835, 108624, 113880, 117676, 135780, 136656, 145080, 147095, 162936, 170820, 176514, 181040, 203670, 227760, 235352, 264771, 271560, 290160, 294190, 325872, 341640, 353028, 407340, 441285, 470704, 529542, 543120, 588380, 683280, 706056, 814680, 882570, 1059084, 1176760, 1323855, 1412112, 1629360, 1765140, 2118168, 2353520, 2647710, 3530280, 4236336, 5295420, 7060560, 10590840, 21181680]

約数ペア:

[(1, 21181680), (2, 10590840), (3, 7060560), (4, 5295420), (5, 4236336), (6, 3530280), (8, 2647710), (9, 2353520), (10, 2118168), (12, 1765140), (13, 1629360), (15, 1412112), (16, 1323855), (18, 1176760), (20, 1059084), (24, 882570), (26, 814680), (30, 706056), (31, 683280), (36, 588380), (39, 543120), (40, 529542), (45, 470704), (48, 441285), (52, 407340), (60, 353028), (62, 341640), (65, 325872), (72, 294190), (73, 290160), (78, 271560), (80, 264771), (90, 235352), (93, 227760), (104, 203670), (117, 181040), (120, 176514), (124, 170820), (130, 162936), (144, 147095), (146, 145080), (155, 136656), (156, 135780), (180, 117676), (186, 113880), (195, 108624), (208, 101835), (219, 96720), (234, 90520), (240, 88257), (248, 85410), (260, 81468), (279, 75920), (292, 72540), (310, 68328), (312, 67890), (360, 58838), (365, 58032), (372, 56940), (390, 54312), (403, 52560), (438, 48360), (465, 45552), (468, 45260), (496, 42705), (520, 40734), (558, 37960), (584, 36270), (585, 36208), (620, 34164), (624, 33945), (657, 32240), (720, 29419), (730, 29016), (744, 28470), (780, 27156), (806, 26280), (876, 24180), (930, 22776), (936, 22630), (949, 22320), (1040, 20367), (1095, 19344), (1116, 18980), (1168, 18135), (1170, 18104), (1209, 17520), (1240, 17082), (1314, 16120), (1395, 15184), (1460, 14508), (1488, 14235), (1560, 13578), (1612, 13140), (1752, 12090), (1860, 11388), (1872, 11315), (1898, 11160), (2015, 10512), (2190, 9672), (2232, 9490), (2263, 9360), (2340, 9052), (2418, 8760), (2480, 8541), (2628, 8060), (2790, 7592), (2847, 7440), (2920, 7254), (3120, 6789), (3224, 6570), (3285, 6448), (3504, 6045), (3627, 5840), (3720, 5694), (3796, 5580), (4030, 5256), (4380, 4836), (4464, 4745), (4526, 4680)]