256720320

素因数分解:

$2^6\times 3^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{691}}^1$

素因数の和:760

約数の個数: 224

約数和(自身を含む): 928055040

約数和(自身を除く): 671334720

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 32, 36, 40, 43, 45, 48, 54, 60, 64, 72, 80, 86, 90, 96, 108, 120, 129, 135, 144, 160, 172, 180, 192, 215, 216, 240, 258, 270, 288, 320, 344, 360, 387, 430, 432, 480, 516, 540, 576, 645, 688, 691, 720, 774, 860, 864, 960, 1032, 1080, 1161, 1290, 1376, 1382, 1440, 1548, 1720, 1728, 1935, 2064, 2073, 2160, 2322, 2580, 2752, 2764, 2880, 3096, 3440, 3455, 3870, 4128, 4146, 4320, 4644, 5160, 5528, 5805, 6192, 6219, 6880, 6910, 7740, 8256, 8292, 8640, 9288, 10320, 10365, 11056, 11610, 12384, 12438, 13760, 13820, 15480, 16584, 18576, 18657, 20640, 20730, 22112, 23220, 24768, 24876, 27640, 29713, 30960, 31095, 33168, 37152, 37314, 41280, 41460, 44224, 46440, 49752, 55280, 59426, 61920, 62190, 66336, 74304, 74628, 82920, 89139, 92880, 93285, 99504, 110560, 118852, 123840, 124380, 132672, 148565, 149256, 165840, 178278, 185760, 186570, 199008, 221120, 237704, 248760, 267417, 297130, 298512, 331680, 356556, 371520, 373140, 398016, 445695, 475408, 497520, 534834, 594260, 597024, 663360, 713112, 746280, 802251, 891390, 950816, 995040, 1069668, 1188520, 1194048, 1337085, 1426224, 1492560, 1604502, 1782780, 1901632, 1990080, 2139336, 2377040, 2674170, 2852448, 2985120, 3209004, 3565560, 4011255, 4278672, 4754080, 5348340, 5704896, 5970240, 6418008, 7131120, 8022510, 8557344, 9508160, 10696680, 12836016, 14262240, 16045020, 17114688, 21393360, 25672032, 28524480, 32090040, 42786720, 51344064, 64180080, 85573440, 128360160, 256720320]

約数ペア:

[(1, 256720320), (2, 128360160), (3, 85573440), (4, 64180080), (5, 51344064), (6, 42786720), (8, 32090040), (9, 28524480), (10, 25672032), (12, 21393360), (15, 17114688), (16, 16045020), (18, 14262240), (20, 12836016), (24, 10696680), (27, 9508160), (30, 8557344), (32, 8022510), (36, 7131120), (40, 6418008), (43, 5970240), (45, 5704896), (48, 5348340), (54, 4754080), (60, 4278672), (64, 4011255), (72, 3565560), (80, 3209004), (86, 2985120), (90, 2852448), (96, 2674170), (108, 2377040), (120, 2139336), (129, 1990080), (135, 1901632), (144, 1782780), (160, 1604502), (172, 1492560), (180, 1426224), (192, 1337085), (215, 1194048), (216, 1188520), (240, 1069668), (258, 995040), (270, 950816), (288, 891390), (320, 802251), (344, 746280), (360, 713112), (387, 663360), (430, 597024), (432, 594260), (480, 534834), (516, 497520), (540, 475408), (576, 445695), (645, 398016), (688, 373140), (691, 371520), (720, 356556), (774, 331680), (860, 298512), (864, 297130), (960, 267417), (1032, 248760), (1080, 237704), (1161, 221120), (1290, 199008), (1376, 186570), (1382, 185760), (1440, 178278), (1548, 165840), (1720, 149256), (1728, 148565), (1935, 132672), (2064, 124380), (2073, 123840), (2160, 118852), (2322, 110560), (2580, 99504), (2752, 93285), (2764, 92880), (2880, 89139), (3096, 82920), (3440, 74628), (3455, 74304), (3870, 66336), (4128, 62190), (4146, 61920), (4320, 59426), (4644, 55280), (5160, 49752), (5528, 46440), (5805, 44224), (6192, 41460), (6219, 41280), (6880, 37314), (6910, 37152), (7740, 33168), (8256, 31095), (8292, 30960), (8640, 29713), (9288, 27640), (10320, 24876), (10365, 24768), (11056, 23220), (11610, 22112), (12384, 20730), (12438, 20640), (13760, 18657), (13820, 18576), (15480, 16584)]