21657720

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1$

素因数の和:122

約数の個数: 256

約数和(自身を含む): 82944000

約数和(自身を除く): 61286280

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 19, 20, 21, 23, 24, 28, 30, 35, 38, 40, 42, 46, 56, 57, 59, 60, 69, 70, 76, 84, 92, 95, 105, 114, 115, 118, 120, 133, 138, 140, 152, 161, 168, 177, 184, 190, 210, 228, 230, 236, 266, 276, 280, 285, 295, 322, 345, 354, 380, 399, 413, 420, 437, 456, 460, 472, 483, 532, 552, 570, 590, 644, 665, 690, 708, 760, 798, 805, 826, 840, 874, 885, 920, 966, 1064, 1121, 1140, 1180, 1239, 1288, 1311, 1330, 1357, 1380, 1416, 1596, 1610, 1652, 1748, 1770, 1932, 1995, 2065, 2185, 2242, 2280, 2360, 2415, 2478, 2622, 2660, 2714, 2760, 3059, 3192, 3220, 3304, 3363, 3496, 3540, 3864, 3990, 4071, 4130, 4370, 4484, 4830, 4956, 5244, 5320, 5428, 5605, 6118, 6195, 6440, 6555, 6726, 6785, 7080, 7847, 7980, 8142, 8260, 8740, 8968, 9177, 9499, 9660, 9912, 10488, 10856, 11210, 12236, 12390, 13110, 13452, 13570, 15295, 15694, 15960, 16284, 16520, 16815, 17480, 18354, 18998, 19320, 20355, 22420, 23541, 24472, 24780, 25783, 26220, 26904, 27140, 28497, 30590, 31388, 32568, 33630, 36708, 37996, 39235, 40710, 44840, 45885, 47082, 47495, 49560, 51566, 52440, 54280, 56994, 61180, 62776, 67260, 73416, 75992, 77349, 78470, 81420, 91770, 94164, 94990, 103132, 113988, 117705, 122360, 128915, 134520, 142485, 154698, 156940, 162840, 180481, 183540, 188328, 189980, 206264, 227976, 235410, 257830, 284970, 309396, 313880, 360962, 367080, 379960, 386745, 470820, 515660, 541443, 569940, 618792, 721924, 773490, 902405, 941640, 1031320, 1082886, 1139880, 1443848, 1546980, 1804810, 2165772, 2707215, 3093960, 3609620, 4331544, 5414430, 7219240, 10828860, 21657720]

約数ペア:

[(1, 21657720), (2, 10828860), (3, 7219240), (4, 5414430), (5, 4331544), (6, 3609620), (7, 3093960), (8, 2707215), (10, 2165772), (12, 1804810), (14, 1546980), (15, 1443848), (19, 1139880), (20, 1082886), (21, 1031320), (23, 941640), (24, 902405), (28, 773490), (30, 721924), (35, 618792), (38, 569940), (40, 541443), (42, 515660), (46, 470820), (56, 386745), (57, 379960), (59, 367080), (60, 360962), (69, 313880), (70, 309396), (76, 284970), (84, 257830), (92, 235410), (95, 227976), (105, 206264), (114, 189980), (115, 188328), (118, 183540), (120, 180481), (133, 162840), (138, 156940), (140, 154698), (152, 142485), (161, 134520), (168, 128915), (177, 122360), (184, 117705), (190, 113988), (210, 103132), (228, 94990), (230, 94164), (236, 91770), (266, 81420), (276, 78470), (280, 77349), (285, 75992), (295, 73416), (322, 67260), (345, 62776), (354, 61180), (380, 56994), (399, 54280), (413, 52440), (420, 51566), (437, 49560), (456, 47495), (460, 47082), (472, 45885), (483, 44840), (532, 40710), (552, 39235), (570, 37996), (590, 36708), (644, 33630), (665, 32568), (690, 31388), (708, 30590), (760, 28497), (798, 27140), (805, 26904), (826, 26220), (840, 25783), (874, 24780), (885, 24472), (920, 23541), (966, 22420), (1064, 20355), (1121, 19320), (1140, 18998), (1180, 18354), (1239, 17480), (1288, 16815), (1311, 16520), (1330, 16284), (1357, 15960), (1380, 15694), (1416, 15295), (1596, 13570), (1610, 13452), (1652, 13110), (1748, 12390), (1770, 12236), (1932, 11210), (1995, 10856), (2065, 10488), (2185, 9912), (2242, 9660), (2280, 9499), (2360, 9177), (2415, 8968), (2478, 8740), (2622, 8260), (2660, 8142), (2714, 7980), (2760, 7847), (3059, 7080), (3192, 6785), (3220, 6726), (3304, 6555), (3363, 6440), (3496, 6195), (3540, 6118), (3864, 5605), (3990, 5428), (4071, 5320), (4130, 5244), (4370, 4956), (4484, 4830)]