256571280

素因数分解:

$2^4\times 3^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{239}}^1$

素因数の和:339

約数の個数: 320

約数和(自身を含む): 1028505600

約数和(自身を除く): 771934320

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 27, 28, 30, 35, 36, 40, 42, 45, 48, 54, 56, 60, 63, 70, 71, 72, 80, 84, 90, 105, 108, 112, 120, 126, 135, 140, 142, 144, 168, 180, 189, 210, 213, 216, 239, 240, 252, 270, 280, 284, 315, 336, 355, 360, 378, 420, 426, 432, 478, 497, 504, 540, 560, 568, 630, 639, 710, 717, 720, 756, 840, 852, 945, 956, 994, 1008, 1065, 1080, 1136, 1195, 1260, 1278, 1420, 1434, 1491, 1512, 1673, 1680, 1704, 1890, 1912, 1917, 1988, 2130, 2151, 2160, 2390, 2485, 2520, 2556, 2840, 2868, 2982, 3024, 3195, 3346, 3408, 3585, 3780, 3824, 3834, 3976, 4260, 4302, 4473, 4780, 4970, 5019, 5040, 5112, 5680, 5736, 5964, 6390, 6453, 6692, 7170, 7455, 7560, 7668, 7952, 8365, 8520, 8604, 8946, 9560, 9585, 9940, 10038, 10224, 10755, 11472, 11928, 12780, 12906, 13384, 13419, 14340, 14910, 15057, 15120, 15336, 16730, 16969, 17040, 17208, 17892, 19120, 19170, 19880, 20076, 21510, 22365, 23856, 25095, 25560, 25812, 26768, 26838, 28680, 29820, 30114, 30672, 32265, 33460, 33938, 34416, 35784, 38340, 39760, 40152, 43020, 44730, 45171, 50190, 50907, 51120, 51624, 53676, 57360, 59640, 60228, 64530, 66920, 67095, 67876, 71568, 75285, 76680, 80304, 84845, 86040, 89460, 90342, 100380, 101814, 103248, 107352, 118783, 119280, 120456, 129060, 133840, 134190, 135752, 150570, 152721, 153360, 169690, 172080, 178920, 180684, 200760, 203628, 214704, 225855, 237566, 240912, 254535, 258120, 268380, 271504, 301140, 305442, 339380, 356349, 357840, 361368, 401520, 407256, 451710, 458163, 475132, 509070, 516240, 536760, 593915, 602280, 610884, 678760, 712698, 722736, 763605, 814512, 903420, 916326, 950264, 1018140, 1069047, 1073520, 1187830, 1204560, 1221768, 1357520, 1425396, 1527210, 1781745, 1806840, 1832652, 1900528, 2036280, 2138094, 2290815, 2375660, 2443536, 2850792, 3054420, 3207141, 3563490, 3613680, 3665304, 4072560, 4276188, 4581630, 4751320, 5345235, 5701584, 6108840, 6414282, 7126980, 7330608, 8552376, 9163260, 9502640, 10690470, 12217680, 12828564, 14253960, 16035705, 17104752, 18326520, 21380940, 25657128, 28507920, 32071410, 36653040, 42761880, 51314256, 64142820, 85523760, 128285640, 256571280]

約数ペア:

[(1, 256571280), (2, 128285640), (3, 85523760), (4, 64142820), (5, 51314256), (6, 42761880), (7, 36653040), (8, 32071410), (9, 28507920), (10, 25657128), (12, 21380940), (14, 18326520), (15, 17104752), (16, 16035705), (18, 14253960), (20, 12828564), (21, 12217680), (24, 10690470), (27, 9502640), (28, 9163260), (30, 8552376), (35, 7330608), (36, 7126980), (40, 6414282), (42, 6108840), (45, 5701584), (48, 5345235), (54, 4751320), (56, 4581630), (60, 4276188), (63, 4072560), (70, 3665304), (71, 3613680), (72, 3563490), (80, 3207141), (84, 3054420), (90, 2850792), (105, 2443536), (108, 2375660), (112, 2290815), (120, 2138094), (126, 2036280), (135, 1900528), (140, 1832652), (142, 1806840), (144, 1781745), (168, 1527210), (180, 1425396), (189, 1357520), (210, 1221768), (213, 1204560), (216, 1187830), (239, 1073520), (240, 1069047), (252, 1018140), (270, 950264), (280, 916326), (284, 903420), (315, 814512), (336, 763605), (355, 722736), (360, 712698), (378, 678760), (420, 610884), (426, 602280), (432, 593915), (478, 536760), (497, 516240), (504, 509070), (540, 475132), (560, 458163), (568, 451710), (630, 407256), (639, 401520), (710, 361368), (717, 357840), (720, 356349), (756, 339380), (840, 305442), (852, 301140), (945, 271504), (956, 268380), (994, 258120), (1008, 254535), (1065, 240912), (1080, 237566), (1136, 225855), (1195, 214704), (1260, 203628), (1278, 200760), (1420, 180684), (1434, 178920), (1491, 172080), (1512, 169690), (1673, 153360), (1680, 152721), (1704, 150570), (1890, 135752), (1912, 134190), (1917, 133840), (1988, 129060), (2130, 120456), (2151, 119280), (2160, 118783), (2390, 107352), (2485, 103248), (2520, 101814), (2556, 100380), (2840, 90342), (2868, 89460), (2982, 86040), (3024, 84845), (3195, 80304), (3346, 76680), (3408, 75285), (3585, 71568), (3780, 67876), (3824, 67095), (3834, 66920), (3976, 64530), (4260, 60228), (4302, 59640), (4473, 57360), (4780, 53676), (4970, 51624), (5019, 51120), (5040, 50907), (5112, 50190), (5680, 45171), (5736, 44730), (5964, 43020), (6390, 40152), (6453, 39760), (6692, 38340), (7170, 35784), (7455, 34416), (7560, 33938), (7668, 33460), (7952, 32265), (8365, 30672), (8520, 30114), (8604, 29820), (8946, 28680), (9560, 26838), (9585, 26768), (9940, 25812), (10038, 25560), (10224, 25095), (10755, 23856), (11472, 22365), (11928, 21510), (12780, 20076), (12906, 19880), (13384, 19170), (13419, 19120), (14340, 17892), (14910, 17208), (15057, 17040), (15120, 16969), (15336, 16730)]