21052080

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{4177}}^1$

素因数の和:4203

約数の個数: 120

約数和(自身を含む): 80819232

約数和(自身を除く): 59767152

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, 4177, 5040, 8354, 12531, 16708, 20885, 25062, 29239, 33416, 37593, 41770, 50124, 58478, 62655, 66832, 75186, 83540, 87717, 100248, 116956, 125310, 146195, 150372, 167080, 175434, 187965, 200496, 233912, 250620, 263151, 292390, 300744, 334160, 350868, 375930, 438585, 467824, 501240, 526302, 584780, 601488, 701736, 751860, 877170, 1002480, 1052604, 1169560, 1315755, 1403472, 1503720, 1754340, 2105208, 2339120, 2631510, 3007440, 3508680, 4210416, 5263020, 7017360, 10526040, 21052080]

約数ペア:

[(1, 21052080), (2, 10526040), (3, 7017360), (4, 5263020), (5, 4210416), (6, 3508680), (7, 3007440), (8, 2631510), (9, 2339120), (10, 2105208), (12, 1754340), (14, 1503720), (15, 1403472), (16, 1315755), (18, 1169560), (20, 1052604), (21, 1002480), (24, 877170), (28, 751860), (30, 701736), (35, 601488), (36, 584780), (40, 526302), (42, 501240), (45, 467824), (48, 438585), (56, 375930), (60, 350868), (63, 334160), (70, 300744), (72, 292390), (80, 263151), (84, 250620), (90, 233912), (105, 200496), (112, 187965), (120, 175434), (126, 167080), (140, 150372), (144, 146195), (168, 125310), (180, 116956), (210, 100248), (240, 87717), (252, 83540), (280, 75186), (315, 66832), (336, 62655), (360, 58478), (420, 50124), (504, 41770), (560, 37593), (630, 33416), (720, 29239), (840, 25062), (1008, 20885), (1260, 16708), (1680, 12531), (2520, 8354), (4177, 5040)]