256521720

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^3\times {\mathrm{139}}^1$

素因数の和:199

約数の個数: 256

約数和(自身を含む): 959616000

約数和(自身を除く): 703094280

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 20, 21, 24, 26, 28, 30, 35, 39, 40, 42, 52, 56, 60, 65, 70, 78, 84, 91, 104, 105, 120, 130, 139, 140, 156, 168, 169, 182, 195, 210, 260, 273, 278, 280, 312, 338, 364, 390, 417, 420, 455, 507, 520, 546, 556, 676, 695, 728, 780, 834, 840, 845, 910, 973, 1014, 1092, 1112, 1183, 1352, 1365, 1390, 1560, 1668, 1690, 1807, 1820, 1946, 2028, 2085, 2184, 2197, 2366, 2535, 2730, 2780, 2919, 3336, 3380, 3549, 3614, 3640, 3892, 4056, 4170, 4394, 4732, 4865, 5070, 5421, 5460, 5560, 5838, 5915, 6591, 6760, 7098, 7228, 7784, 8340, 8788, 9035, 9464, 9730, 10140, 10842, 10920, 10985, 11676, 11830, 12649, 13182, 14196, 14456, 14595, 15379, 16680, 17576, 17745, 18070, 19460, 20280, 21684, 21970, 23352, 23491, 23660, 25298, 26364, 27105, 28392, 29190, 30758, 32955, 35490, 36140, 37947, 38920, 43368, 43940, 46137, 46982, 47320, 50596, 52728, 54210, 58380, 61516, 63245, 65910, 70473, 70980, 72280, 75894, 76895, 87880, 92274, 93964, 101192, 108420, 116760, 117455, 123032, 126490, 131820, 140946, 141960, 151788, 153790, 164437, 184548, 187928, 189735, 216840, 230685, 234910, 252980, 263640, 281892, 303576, 305383, 307580, 328874, 352365, 369096, 379470, 461370, 469820, 493311, 505960, 563784, 610766, 615160, 657748, 704730, 758940, 822185, 916149, 922740, 939640, 986622, 1221532, 1315496, 1409460, 1517880, 1526915, 1644370, 1832298, 1845480, 1973244, 2137681, 2443064, 2466555, 2818920, 3053830, 3288740, 3664596, 3946488, 4275362, 4580745, 4933110, 6107660, 6413043, 6577480, 7329192, 8550724, 9161490, 9866220, 10688405, 12215320, 12826086, 17101448, 18322980, 19732440, 21376810, 25652172, 32065215, 36645960, 42753620, 51304344, 64130430, 85507240, 128260860, 256521720]

約数ペア:

[(1, 256521720), (2, 128260860), (3, 85507240), (4, 64130430), (5, 51304344), (6, 42753620), (7, 36645960), (8, 32065215), (10, 25652172), (12, 21376810), (13, 19732440), (14, 18322980), (15, 17101448), (20, 12826086), (21, 12215320), (24, 10688405), (26, 9866220), (28, 9161490), (30, 8550724), (35, 7329192), (39, 6577480), (40, 6413043), (42, 6107660), (52, 4933110), (56, 4580745), (60, 4275362), (65, 3946488), (70, 3664596), (78, 3288740), (84, 3053830), (91, 2818920), (104, 2466555), (105, 2443064), (120, 2137681), (130, 1973244), (139, 1845480), (140, 1832298), (156, 1644370), (168, 1526915), (169, 1517880), (182, 1409460), (195, 1315496), (210, 1221532), (260, 986622), (273, 939640), (278, 922740), (280, 916149), (312, 822185), (338, 758940), (364, 704730), (390, 657748), (417, 615160), (420, 610766), (455, 563784), (507, 505960), (520, 493311), (546, 469820), (556, 461370), (676, 379470), (695, 369096), (728, 352365), (780, 328874), (834, 307580), (840, 305383), (845, 303576), (910, 281892), (973, 263640), (1014, 252980), (1092, 234910), (1112, 230685), (1183, 216840), (1352, 189735), (1365, 187928), (1390, 184548), (1560, 164437), (1668, 153790), (1690, 151788), (1807, 141960), (1820, 140946), (1946, 131820), (2028, 126490), (2085, 123032), (2184, 117455), (2197, 116760), (2366, 108420), (2535, 101192), (2730, 93964), (2780, 92274), (2919, 87880), (3336, 76895), (3380, 75894), (3549, 72280), (3614, 70980), (3640, 70473), (3892, 65910), (4056, 63245), (4170, 61516), (4394, 58380), (4732, 54210), (4865, 52728), (5070, 50596), (5421, 47320), (5460, 46982), (5560, 46137), (5838, 43940), (5915, 43368), (6591, 38920), (6760, 37947), (7098, 36140), (7228, 35490), (7784, 32955), (8340, 30758), (8788, 29190), (9035, 28392), (9464, 27105), (9730, 26364), (10140, 25298), (10842, 23660), (10920, 23491), (10985, 23352), (11676, 21970), (11830, 21684), (12649, 20280), (13182, 19460), (14196, 18070), (14456, 17745), (14595, 17576), (15379, 16680)]