21808080

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{4327}}^1$

素因数の和:4353

約数の個数: 120

約数和(自身を含む): 83720832

約数和(自身を除く): 61912752

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 48, 56, 60, 63, 70, 72, 80, 84, 90, 105, 112, 120, 126, 140, 144, 168, 180, 210, 240, 252, 280, 315, 336, 360, 420, 504, 560, 630, 720, 840, 1008, 1260, 1680, 2520, 4327, 5040, 8654, 12981, 17308, 21635, 25962, 30289, 34616, 38943, 43270, 51924, 60578, 64905, 69232, 77886, 86540, 90867, 103848, 121156, 129810, 151445, 155772, 173080, 181734, 194715, 207696, 242312, 259620, 272601, 302890, 311544, 346160, 363468, 389430, 454335, 484624, 519240, 545202, 605780, 623088, 726936, 778860, 908670, 1038480, 1090404, 1211560, 1363005, 1453872, 1557720, 1817340, 2180808, 2423120, 2726010, 3115440, 3634680, 4361616, 5452020, 7269360, 10904040, 21808080]

約数ペア:

[(1, 21808080), (2, 10904040), (3, 7269360), (4, 5452020), (5, 4361616), (6, 3634680), (7, 3115440), (8, 2726010), (9, 2423120), (10, 2180808), (12, 1817340), (14, 1557720), (15, 1453872), (16, 1363005), (18, 1211560), (20, 1090404), (21, 1038480), (24, 908670), (28, 778860), (30, 726936), (35, 623088), (36, 605780), (40, 545202), (42, 519240), (45, 484624), (48, 454335), (56, 389430), (60, 363468), (63, 346160), (70, 311544), (72, 302890), (80, 272601), (84, 259620), (90, 242312), (105, 207696), (112, 194715), (120, 181734), (126, 173080), (140, 155772), (144, 151445), (168, 129810), (180, 121156), (210, 103848), (240, 90867), (252, 86540), (280, 77886), (315, 69232), (336, 64905), (360, 60578), (420, 51924), (504, 43270), (560, 38943), (630, 34616), (720, 30289), (840, 25962), (1008, 21635), (1260, 17308), (1680, 12981), (2520, 8654), (4327, 5040)]