256991280

素因数分解:

$2^4\times 3^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{41}}^2$

素因数の和:125

約数の個数: 360

約数和(自身を含む): 1022965776

約数和(自身を除く): 765974496

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 16, 20, 21, 24, 26, 28, 30, 35, 39, 40, 41, 42, 48, 49, 52, 56, 60, 65, 70, 78, 80, 82, 84, 91, 98, 104, 105, 112, 120, 123, 130, 140, 147, 156, 164, 168, 182, 195, 196, 205, 208, 210, 240, 245, 246, 260, 273, 280, 287, 294, 312, 328, 336, 364, 390, 392, 410, 420, 455, 490, 492, 520, 533, 546, 560, 574, 588, 615, 624, 637, 656, 728, 735, 780, 784, 820, 840, 861, 910, 980, 984, 1040, 1066, 1092, 1148, 1176, 1230, 1274, 1365, 1435, 1456, 1470, 1560, 1599, 1640, 1680, 1681, 1722, 1820, 1911, 1960, 1968, 2009, 2132, 2184, 2296, 2352, 2460, 2548, 2665, 2730, 2870, 2940, 3120, 3185, 3198, 3280, 3362, 3444, 3640, 3731, 3822, 3920, 4018, 4264, 4305, 4368, 4592, 4920, 5043, 5096, 5330, 5460, 5740, 5880, 6027, 6370, 6396, 6724, 6888, 7280, 7462, 7644, 7995, 8036, 8405, 8528, 8610, 9555, 9840, 10045, 10086, 10192, 10660, 10920, 11193, 11480, 11760, 11767, 12054, 12740, 12792, 13448, 13776, 14924, 15288, 15990, 16072, 16810, 17220, 18655, 19110, 20090, 20172, 21320, 21840, 21853, 22386, 22960, 23534, 24108, 25215, 25480, 25584, 26117, 26896, 29848, 30135, 30576, 31980, 32144, 33620, 34440, 35301, 37310, 38220, 40180, 40344, 42640, 43706, 44772, 47068, 48216, 50430, 50960, 52234, 55965, 58835, 59696, 60270, 63960, 65559, 67240, 68880, 70602, 74620, 76440, 78351, 80360, 80688, 82369, 87412, 89544, 94136, 96432, 100860, 104468, 109265, 111930, 117670, 120540, 127920, 130585, 131118, 134480, 141204, 149240, 152880, 152971, 156702, 160720, 164738, 174824, 176505, 179088, 188272, 201720, 208936, 218530, 223860, 235340, 241080, 247107, 261170, 262236, 282408, 298480, 305942, 313404, 327795, 329476, 349648, 353010, 391755, 403440, 411845, 417872, 437060, 447720, 458913, 470680, 482160, 494214, 522340, 524472, 564816, 611884, 626808, 655590, 658952, 706020, 764855, 783510, 823690, 874120, 895440, 917826, 941360, 988428, 1044680, 1048944, 1070797, 1223768, 1235535, 1253616, 1311180, 1317904, 1412040, 1529710, 1567020, 1647380, 1748240, 1835652, 1976856, 2089360, 2141594, 2294565, 2447536, 2471070, 2622360, 2824080, 3059420, 3134040, 3212391, 3294760, 3671304, 3953712, 4283188, 4589130, 4942140, 5244720, 5353985, 6118840, 6268080, 6424782, 6589520, 7342608, 8566376, 9178260, 9884280, 10707970, 12237680, 12849564, 16061955, 17132752, 18356520, 19768560, 21415940, 25699128, 32123910, 36713040, 42831880, 51398256, 64247820, 85663760, 128495640, 256991280]

約数ペア:

[(1, 256991280), (2, 128495640), (3, 85663760), (4, 64247820), (5, 51398256), (6, 42831880), (7, 36713040), (8, 32123910), (10, 25699128), (12, 21415940), (13, 19768560), (14, 18356520), (15, 17132752), (16, 16061955), (20, 12849564), (21, 12237680), (24, 10707970), (26, 9884280), (28, 9178260), (30, 8566376), (35, 7342608), (39, 6589520), (40, 6424782), (41, 6268080), (42, 6118840), (48, 5353985), (49, 5244720), (52, 4942140), (56, 4589130), (60, 4283188), (65, 3953712), (70, 3671304), (78, 3294760), (80, 3212391), (82, 3134040), (84, 3059420), (91, 2824080), (98, 2622360), (104, 2471070), (105, 2447536), (112, 2294565), (120, 2141594), (123, 2089360), (130, 1976856), (140, 1835652), (147, 1748240), (156, 1647380), (164, 1567020), (168, 1529710), (182, 1412040), (195, 1317904), (196, 1311180), (205, 1253616), (208, 1235535), (210, 1223768), (240, 1070797), (245, 1048944), (246, 1044680), (260, 988428), (273, 941360), (280, 917826), (287, 895440), (294, 874120), (312, 823690), (328, 783510), (336, 764855), (364, 706020), (390, 658952), (392, 655590), (410, 626808), (420, 611884), (455, 564816), (490, 524472), (492, 522340), (520, 494214), (533, 482160), (546, 470680), (560, 458913), (574, 447720), (588, 437060), (615, 417872), (624, 411845), (637, 403440), (656, 391755), (728, 353010), (735, 349648), (780, 329476), (784, 327795), (820, 313404), (840, 305942), (861, 298480), (910, 282408), (980, 262236), (984, 261170), (1040, 247107), (1066, 241080), (1092, 235340), (1148, 223860), (1176, 218530), (1230, 208936), (1274, 201720), (1365, 188272), (1435, 179088), (1456, 176505), (1470, 174824), (1560, 164738), (1599, 160720), (1640, 156702), (1680, 152971), (1681, 152880), (1722, 149240), (1820, 141204), (1911, 134480), (1960, 131118), (1968, 130585), (2009, 127920), (2132, 120540), (2184, 117670), (2296, 111930), (2352, 109265), (2460, 104468), (2548, 100860), (2665, 96432), (2730, 94136), (2870, 89544), (2940, 87412), (3120, 82369), (3185, 80688), (3198, 80360), (3280, 78351), (3362, 76440), (3444, 74620), (3640, 70602), (3731, 68880), (3822, 67240), (3920, 65559), (4018, 63960), (4264, 60270), (4305, 59696), (4368, 58835), (4592, 55965), (4920, 52234), (5043, 50960), (5096, 50430), (5330, 48216), (5460, 47068), (5740, 44772), (5880, 43706), (6027, 42640), (6370, 40344), (6396, 40180), (6724, 38220), (6888, 37310), (7280, 35301), (7462, 34440), (7644, 33620), (7995, 32144), (8036, 31980), (8405, 30576), (8528, 30135), (8610, 29848), (9555, 26896), (9840, 26117), (10045, 25584), (10086, 25480), (10192, 25215), (10660, 24108), (10920, 23534), (11193, 22960), (11480, 22386), (11760, 21853), (11767, 21840), (12054, 21320), (12740, 20172), (12792, 20090), (13448, 19110), (13776, 18655), (14924, 17220), (15288, 16810), (15990, 16072)]