81987840

素因数分解:

$2^8\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{647}}^1$

素因数の和:685

約数の個数: 216

約数和(自身を含む): 309935808

約数和(自身を除く): 227947968

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 30, 32, 33, 36, 40, 44, 45, 48, 55, 60, 64, 66, 72, 80, 88, 90, 96, 99, 110, 120, 128, 132, 144, 160, 165, 176, 180, 192, 198, 220, 240, 256, 264, 288, 320, 330, 352, 360, 384, 396, 440, 480, 495, 528, 576, 640, 647, 660, 704, 720, 768, 792, 880, 960, 990, 1056, 1152, 1280, 1294, 1320, 1408, 1440, 1584, 1760, 1920, 1941, 1980, 2112, 2304, 2588, 2640, 2816, 2880, 3168, 3235, 3520, 3840, 3882, 3960, 4224, 5176, 5280, 5760, 5823, 6336, 6470, 7040, 7117, 7764, 7920, 8448, 9705, 10352, 10560, 11520, 11646, 12672, 12940, 14080, 14234, 15528, 15840, 19410, 20704, 21120, 21351, 23292, 25344, 25880, 28468, 29115, 31056, 31680, 35585, 38820, 41408, 42240, 42702, 46584, 51760, 56936, 58230, 62112, 63360, 64053, 71170, 77640, 82816, 85404, 93168, 103520, 106755, 113872, 116460, 124224, 126720, 128106, 142340, 155280, 165632, 170808, 186336, 207040, 213510, 227744, 232920, 248448, 256212, 284680, 310560, 320265, 341616, 372672, 414080, 427020, 455488, 465840, 496896, 512424, 569360, 621120, 640530, 683232, 745344, 828160, 854040, 910976, 931680, 1024848, 1138720, 1242240, 1281060, 1366464, 1490688, 1708080, 1821952, 1863360, 2049696, 2277440, 2484480, 2562120, 2732928, 3416160, 3726720, 4099392, 4554880, 5124240, 5465856, 6832320, 7453440, 8198784, 9109760, 10248480, 13664640, 16397568, 20496960, 27329280, 40993920, 81987840]

約数ペア:

[(1, 81987840), (2, 40993920), (3, 27329280), (4, 20496960), (5, 16397568), (6, 13664640), (8, 10248480), (9, 9109760), (10, 8198784), (11, 7453440), (12, 6832320), (15, 5465856), (16, 5124240), (18, 4554880), (20, 4099392), (22, 3726720), (24, 3416160), (30, 2732928), (32, 2562120), (33, 2484480), (36, 2277440), (40, 2049696), (44, 1863360), (45, 1821952), (48, 1708080), (55, 1490688), (60, 1366464), (64, 1281060), (66, 1242240), (72, 1138720), (80, 1024848), (88, 931680), (90, 910976), (96, 854040), (99, 828160), (110, 745344), (120, 683232), (128, 640530), (132, 621120), (144, 569360), (160, 512424), (165, 496896), (176, 465840), (180, 455488), (192, 427020), (198, 414080), (220, 372672), (240, 341616), (256, 320265), (264, 310560), (288, 284680), (320, 256212), (330, 248448), (352, 232920), (360, 227744), (384, 213510), (396, 207040), (440, 186336), (480, 170808), (495, 165632), (528, 155280), (576, 142340), (640, 128106), (647, 126720), (660, 124224), (704, 116460), (720, 113872), (768, 106755), (792, 103520), (880, 93168), (960, 85404), (990, 82816), (1056, 77640), (1152, 71170), (1280, 64053), (1294, 63360), (1320, 62112), (1408, 58230), (1440, 56936), (1584, 51760), (1760, 46584), (1920, 42702), (1941, 42240), (1980, 41408), (2112, 38820), (2304, 35585), (2588, 31680), (2640, 31056), (2816, 29115), (2880, 28468), (3168, 25880), (3235, 25344), (3520, 23292), (3840, 21351), (3882, 21120), (3960, 20704), (4224, 19410), (5176, 15840), (5280, 15528), (5760, 14234), (5823, 14080), (6336, 12940), (6470, 12672), (7040, 11646), (7117, 11520), (7764, 10560), (7920, 10352), (8448, 9705)]