81710720

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1$

素因数の和:123

約数の個数: 256

約数和(自身を含む): 254983680

約数和(自身を除く): 173272960

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 23, 26, 28, 32, 35, 40, 46, 52, 56, 61, 64, 65, 70, 80, 91, 92, 104, 112, 115, 122, 128, 130, 140, 160, 161, 182, 184, 208, 224, 230, 244, 260, 280, 299, 305, 320, 322, 364, 368, 416, 427, 448, 455, 460, 488, 520, 560, 598, 610, 640, 644, 728, 736, 793, 805, 832, 854, 896, 910, 920, 976, 1040, 1120, 1196, 1220, 1288, 1403, 1456, 1472, 1495, 1586, 1610, 1664, 1708, 1820, 1840, 1952, 2080, 2093, 2135, 2240, 2392, 2440, 2576, 2806, 2912, 2944, 2990, 3172, 3220, 3416, 3640, 3680, 3904, 3965, 4160, 4186, 4270, 4480, 4784, 4880, 5152, 5551, 5612, 5824, 5980, 6344, 6440, 6832, 7015, 7280, 7360, 7808, 7930, 8320, 8372, 8540, 9568, 9760, 9821, 10304, 10465, 11102, 11224, 11648, 11960, 12688, 12880, 13664, 14030, 14560, 14720, 15860, 16744, 17080, 18239, 19136, 19520, 19642, 20608, 20930, 22204, 22448, 23920, 25376, 25760, 27328, 27755, 28060, 29120, 31720, 33488, 34160, 36478, 38272, 39040, 39284, 41860, 44408, 44896, 47840, 49105, 50752, 51520, 54656, 55510, 56120, 58240, 63440, 66976, 68320, 72956, 78568, 83720, 88816, 89792, 91195, 95680, 98210, 101504, 103040, 111020, 112240, 126880, 127673, 133952, 136640, 145912, 157136, 167440, 177632, 179584, 182390, 191360, 196420, 222040, 224480, 253760, 255346, 267904, 273280, 291824, 314272, 334880, 355264, 364780, 392840, 444080, 448960, 507520, 510692, 583648, 628544, 638365, 669760, 710528, 729560, 785680, 888160, 897920, 1021384, 1167296, 1257088, 1276730, 1339520, 1459120, 1571360, 1776320, 2042768, 2334592, 2553460, 2918240, 3142720, 3552640, 4085536, 5106920, 5836480, 6285440, 8171072, 10213840, 11672960, 16342144, 20427680, 40855360, 81710720]

約数ペア:

[(1, 81710720), (2, 40855360), (4, 20427680), (5, 16342144), (7, 11672960), (8, 10213840), (10, 8171072), (13, 6285440), (14, 5836480), (16, 5106920), (20, 4085536), (23, 3552640), (26, 3142720), (28, 2918240), (32, 2553460), (35, 2334592), (40, 2042768), (46, 1776320), (52, 1571360), (56, 1459120), (61, 1339520), (64, 1276730), (65, 1257088), (70, 1167296), (80, 1021384), (91, 897920), (92, 888160), (104, 785680), (112, 729560), (115, 710528), (122, 669760), (128, 638365), (130, 628544), (140, 583648), (160, 510692), (161, 507520), (182, 448960), (184, 444080), (208, 392840), (224, 364780), (230, 355264), (244, 334880), (260, 314272), (280, 291824), (299, 273280), (305, 267904), (320, 255346), (322, 253760), (364, 224480), (368, 222040), (416, 196420), (427, 191360), (448, 182390), (455, 179584), (460, 177632), (488, 167440), (520, 157136), (560, 145912), (598, 136640), (610, 133952), (640, 127673), (644, 126880), (728, 112240), (736, 111020), (793, 103040), (805, 101504), (832, 98210), (854, 95680), (896, 91195), (910, 89792), (920, 88816), (976, 83720), (1040, 78568), (1120, 72956), (1196, 68320), (1220, 66976), (1288, 63440), (1403, 58240), (1456, 56120), (1472, 55510), (1495, 54656), (1586, 51520), (1610, 50752), (1664, 49105), (1708, 47840), (1820, 44896), (1840, 44408), (1952, 41860), (2080, 39284), (2093, 39040), (2135, 38272), (2240, 36478), (2392, 34160), (2440, 33488), (2576, 31720), (2806, 29120), (2912, 28060), (2944, 27755), (2990, 27328), (3172, 25760), (3220, 25376), (3416, 23920), (3640, 22448), (3680, 22204), (3904, 20930), (3965, 20608), (4160, 19642), (4186, 19520), (4270, 19136), (4480, 18239), (4784, 17080), (4880, 16744), (5152, 15860), (5551, 14720), (5612, 14560), (5824, 14030), (5980, 13664), (6344, 12880), (6440, 12688), (6832, 11960), (7015, 11648), (7280, 11224), (7360, 11102), (7808, 10465), (7930, 10304), (8320, 9821), (8372, 9760), (8540, 9568)]