256006400

素因数分解:

$2^8\times 5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{181}}^1$

素因数の和:237

約数の個数: 216

約数和(自身を含む): 726531624

約数和(自身を除く): 470525224

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 17, 20, 25, 26, 32, 34, 40, 50, 52, 64, 65, 68, 80, 85, 100, 104, 128, 130, 136, 160, 170, 181, 200, 208, 221, 256, 260, 272, 320, 325, 340, 362, 400, 416, 425, 442, 520, 544, 640, 650, 680, 724, 800, 832, 850, 884, 905, 1040, 1088, 1105, 1280, 1300, 1360, 1448, 1600, 1664, 1700, 1768, 1810, 2080, 2176, 2210, 2353, 2600, 2720, 2896, 3077, 3200, 3328, 3400, 3536, 3620, 4160, 4352, 4420, 4525, 4706, 5200, 5440, 5525, 5792, 6154, 6400, 6800, 7072, 7240, 8320, 8840, 9050, 9412, 10400, 10880, 11050, 11584, 11765, 12308, 13600, 14144, 14480, 15385, 16640, 17680, 18100, 18824, 20800, 21760, 22100, 23168, 23530, 24616, 27200, 28288, 28960, 30770, 35360, 36200, 37648, 40001, 41600, 44200, 46336, 47060, 49232, 54400, 56576, 57920, 58825, 61540, 70720, 72400, 75296, 76925, 80002, 83200, 88400, 94120, 98464, 108800, 115840, 117650, 123080, 141440, 144800, 150592, 153850, 160004, 176800, 188240, 196928, 200005, 231680, 235300, 246160, 282880, 289600, 301184, 307700, 320008, 353600, 376480, 393856, 400010, 470600, 492320, 579200, 602368, 615400, 640016, 707200, 752960, 787712, 800020, 941200, 984640, 1000025, 1158400, 1230800, 1280032, 1414400, 1505920, 1600040, 1882400, 1969280, 2000050, 2461600, 2560064, 3011840, 3200080, 3764800, 3938560, 4000100, 4923200, 5120128, 6400160, 7529600, 8000200, 9846400, 10240256, 12800320, 15059200, 16000400, 19692800, 25600640, 32000800, 51201280, 64001600, 128003200, 256006400]

約数ペア:

[(1, 256006400), (2, 128003200), (4, 64001600), (5, 51201280), (8, 32000800), (10, 25600640), (13, 19692800), (16, 16000400), (17, 15059200), (20, 12800320), (25, 10240256), (26, 9846400), (32, 8000200), (34, 7529600), (40, 6400160), (50, 5120128), (52, 4923200), (64, 4000100), (65, 3938560), (68, 3764800), (80, 3200080), (85, 3011840), (100, 2560064), (104, 2461600), (128, 2000050), (130, 1969280), (136, 1882400), (160, 1600040), (170, 1505920), (181, 1414400), (200, 1280032), (208, 1230800), (221, 1158400), (256, 1000025), (260, 984640), (272, 941200), (320, 800020), (325, 787712), (340, 752960), (362, 707200), (400, 640016), (416, 615400), (425, 602368), (442, 579200), (520, 492320), (544, 470600), (640, 400010), (650, 393856), (680, 376480), (724, 353600), (800, 320008), (832, 307700), (850, 301184), (884, 289600), (905, 282880), (1040, 246160), (1088, 235300), (1105, 231680), (1280, 200005), (1300, 196928), (1360, 188240), (1448, 176800), (1600, 160004), (1664, 153850), (1700, 150592), (1768, 144800), (1810, 141440), (2080, 123080), (2176, 117650), (2210, 115840), (2353, 108800), (2600, 98464), (2720, 94120), (2896, 88400), (3077, 83200), (3200, 80002), (3328, 76925), (3400, 75296), (3536, 72400), (3620, 70720), (4160, 61540), (4352, 58825), (4420, 57920), (4525, 56576), (4706, 54400), (5200, 49232), (5440, 47060), (5525, 46336), (5792, 44200), (6154, 41600), (6400, 40001), (6800, 37648), (7072, 36200), (7240, 35360), (8320, 30770), (8840, 28960), (9050, 28288), (9412, 27200), (10400, 24616), (10880, 23530), (11050, 23168), (11584, 22100), (11765, 21760), (12308, 20800), (13600, 18824), (14144, 18100), (14480, 17680), (15385, 16640)]