640314720

素因数分解:

$2^5\times 3^5\times 5^1\times {\mathrm{43}}^1\times {\mathrm{383}}^1$

素因数の和:456

約数の個数: 288

約数和(自身を含む): 2324754432

約数和(自身を除く): 1684439712

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, 72, 80, 81, 86, 90, 96, 108, 120, 129, 135, 144, 160, 162, 172, 180, 215, 216, 240, 243, 258, 270, 288, 324, 344, 360, 383, 387, 405, 430, 432, 480, 486, 516, 540, 645, 648, 688, 720, 766, 774, 810, 860, 864, 972, 1032, 1080, 1149, 1161, 1215, 1290, 1296, 1376, 1440, 1532, 1548, 1620, 1720, 1915, 1935, 1944, 2064, 2160, 2298, 2322, 2430, 2580, 2592, 3064, 3096, 3240, 3440, 3447, 3483, 3830, 3870, 3888, 4128, 4320, 4596, 4644, 4860, 5160, 5745, 5805, 6128, 6192, 6480, 6880, 6894, 6966, 7660, 7740, 7776, 9192, 9288, 9720, 10320, 10341, 10449, 11490, 11610, 12256, 12384, 12960, 13788, 13932, 15320, 15480, 16469, 17235, 17415, 18384, 18576, 19440, 20640, 20682, 20898, 22980, 23220, 27576, 27864, 30640, 30960, 31023, 32938, 34470, 34830, 36768, 37152, 38880, 41364, 41796, 45960, 46440, 49407, 51705, 52245, 55152, 55728, 61280, 61920, 62046, 65876, 68940, 69660, 82345, 82728, 83592, 91920, 92880, 93069, 98814, 103410, 104490, 110304, 111456, 124092, 131752, 137880, 139320, 148221, 155115, 164690, 165456, 167184, 183840, 185760, 186138, 197628, 206820, 208980, 247035, 248184, 263504, 275760, 278640, 296442, 310230, 329380, 330912, 334368, 372276, 395256, 413640, 417960, 444663, 465345, 494070, 496368, 527008, 551520, 557280, 592884, 620460, 658760, 741105, 744552, 790512, 827280, 835920, 889326, 930690, 988140, 992736, 1185768, 1240920, 1317520, 1333989, 1482210, 1489104, 1581024, 1654560, 1671840, 1778652, 1861380, 1976280, 2223315, 2371536, 2481840, 2635040, 2667978, 2964420, 2978208, 3557304, 3722760, 3952560, 4001967, 4446630, 4743072, 4963680, 5335956, 5928840, 6669945, 7114608, 7445520, 7905120, 8003934, 8893260, 10671912, 11857680, 13339890, 14229216, 14891040, 16007868, 17786520, 20009835, 21343824, 23715360, 26679780, 32015736, 35573040, 40019670, 42687648, 53359560, 64031472, 71146080, 80039340, 106719120, 128062944, 160078680, 213438240, 320157360, 640314720]

約数ペア:

[(1, 640314720), (2, 320157360), (3, 213438240), (4, 160078680), (5, 128062944), (6, 106719120), (8, 80039340), (9, 71146080), (10, 64031472), (12, 53359560), (15, 42687648), (16, 40019670), (18, 35573040), (20, 32015736), (24, 26679780), (27, 23715360), (30, 21343824), (32, 20009835), (36, 17786520), (40, 16007868), (43, 14891040), (45, 14229216), (48, 13339890), (54, 11857680), (60, 10671912), (72, 8893260), (80, 8003934), (81, 7905120), (86, 7445520), (90, 7114608), (96, 6669945), (108, 5928840), (120, 5335956), (129, 4963680), (135, 4743072), (144, 4446630), (160, 4001967), (162, 3952560), (172, 3722760), (180, 3557304), (215, 2978208), (216, 2964420), (240, 2667978), (243, 2635040), (258, 2481840), (270, 2371536), (288, 2223315), (324, 1976280), (344, 1861380), (360, 1778652), (383, 1671840), (387, 1654560), (405, 1581024), (430, 1489104), (432, 1482210), (480, 1333989), (486, 1317520), (516, 1240920), (540, 1185768), (645, 992736), (648, 988140), (688, 930690), (720, 889326), (766, 835920), (774, 827280), (810, 790512), (860, 744552), (864, 741105), (972, 658760), (1032, 620460), (1080, 592884), (1149, 557280), (1161, 551520), (1215, 527008), (1290, 496368), (1296, 494070), (1376, 465345), (1440, 444663), (1532, 417960), (1548, 413640), (1620, 395256), (1720, 372276), (1915, 334368), (1935, 330912), (1944, 329380), (2064, 310230), (2160, 296442), (2298, 278640), (2322, 275760), (2430, 263504), (2580, 248184), (2592, 247035), (3064, 208980), (3096, 206820), (3240, 197628), (3440, 186138), (3447, 185760), (3483, 183840), (3830, 167184), (3870, 165456), (3888, 164690), (4128, 155115), (4320, 148221), (4596, 139320), (4644, 137880), (4860, 131752), (5160, 124092), (5745, 111456), (5805, 110304), (6128, 104490), (6192, 103410), (6480, 98814), (6880, 93069), (6894, 92880), (6966, 91920), (7660, 83592), (7740, 82728), (7776, 82345), (9192, 69660), (9288, 68940), (9720, 65876), (10320, 62046), (10341, 61920), (10449, 61280), (11490, 55728), (11610, 55152), (12256, 52245), (12384, 51705), (12960, 49407), (13788, 46440), (13932, 45960), (15320, 41796), (15480, 41364), (16469, 38880), (17235, 37152), (17415, 36768), (18384, 34830), (18576, 34470), (19440, 32938), (20640, 31023), (20682, 30960), (20898, 30640), (22980, 27864), (23220, 27576)]