20378880

素因数分解:

$2^8\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1$

素因数の和:117

約数の個数: 216

約数和(自身を含む): 74135880

約数和(自身を除く): 53757000

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 29, 30, 32, 36, 40, 45, 48, 58, 60, 61, 64, 72, 80, 87, 90, 96, 116, 120, 122, 128, 144, 145, 160, 174, 180, 183, 192, 232, 240, 244, 256, 261, 288, 290, 305, 320, 348, 360, 366, 384, 435, 464, 480, 488, 522, 549, 576, 580, 610, 640, 696, 720, 732, 768, 870, 915, 928, 960, 976, 1044, 1098, 1152, 1160, 1220, 1280, 1305, 1392, 1440, 1464, 1740, 1769, 1830, 1856, 1920, 1952, 2088, 2196, 2304, 2320, 2440, 2610, 2745, 2784, 2880, 2928, 3480, 3538, 3660, 3712, 3840, 3904, 4176, 4392, 4640, 4880, 5220, 5307, 5490, 5568, 5760, 5856, 6960, 7076, 7320, 7424, 7808, 8352, 8784, 8845, 9280, 9760, 10440, 10614, 10980, 11136, 11520, 11712, 13920, 14152, 14640, 15616, 15921, 16704, 17568, 17690, 18560, 19520, 20880, 21228, 21960, 22272, 23424, 26535, 27840, 28304, 29280, 31842, 33408, 35136, 35380, 37120, 39040, 41760, 42456, 43920, 46848, 53070, 55680, 56608, 58560, 63684, 66816, 70272, 70760, 78080, 79605, 83520, 84912, 87840, 106140, 111360, 113216, 117120, 127368, 140544, 141520, 159210, 167040, 169824, 175680, 212280, 226432, 234240, 254736, 283040, 318420, 334080, 339648, 351360, 424560, 452864, 509472, 566080, 636840, 679296, 702720, 849120, 1018944, 1132160, 1273680, 1358592, 1698240, 2037888, 2264320, 2547360, 3396480, 4075776, 5094720, 6792960, 10189440, 20378880]

約数ペア:

[(1, 20378880), (2, 10189440), (3, 6792960), (4, 5094720), (5, 4075776), (6, 3396480), (8, 2547360), (9, 2264320), (10, 2037888), (12, 1698240), (15, 1358592), (16, 1273680), (18, 1132160), (20, 1018944), (24, 849120), (29, 702720), (30, 679296), (32, 636840), (36, 566080), (40, 509472), (45, 452864), (48, 424560), (58, 351360), (60, 339648), (61, 334080), (64, 318420), (72, 283040), (80, 254736), (87, 234240), (90, 226432), (96, 212280), (116, 175680), (120, 169824), (122, 167040), (128, 159210), (144, 141520), (145, 140544), (160, 127368), (174, 117120), (180, 113216), (183, 111360), (192, 106140), (232, 87840), (240, 84912), (244, 83520), (256, 79605), (261, 78080), (288, 70760), (290, 70272), (305, 66816), (320, 63684), (348, 58560), (360, 56608), (366, 55680), (384, 53070), (435, 46848), (464, 43920), (480, 42456), (488, 41760), (522, 39040), (549, 37120), (576, 35380), (580, 35136), (610, 33408), (640, 31842), (696, 29280), (720, 28304), (732, 27840), (768, 26535), (870, 23424), (915, 22272), (928, 21960), (960, 21228), (976, 20880), (1044, 19520), (1098, 18560), (1152, 17690), (1160, 17568), (1220, 16704), (1280, 15921), (1305, 15616), (1392, 14640), (1440, 14152), (1464, 13920), (1740, 11712), (1769, 11520), (1830, 11136), (1856, 10980), (1920, 10614), (1952, 10440), (2088, 9760), (2196, 9280), (2304, 8845), (2320, 8784), (2440, 8352), (2610, 7808), (2745, 7424), (2784, 7320), (2880, 7076), (2928, 6960), (3480, 5856), (3538, 5760), (3660, 5568), (3712, 5490), (3840, 5307), (3904, 5220), (4176, 4880), (4392, 4640)]