21015120

素因数分解:

$2^4\times 3^1\times 5^1\times 7^2\times {\mathrm{1787}}^1$

素因数の和:1817

約数の個数: 120

約数和(自身を含む): 75825504

約数和(自身を除く): 54810384

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 49, 56, 60, 70, 80, 84, 98, 105, 112, 120, 140, 147, 168, 196, 210, 240, 245, 280, 294, 336, 392, 420, 490, 560, 588, 735, 784, 840, 980, 1176, 1470, 1680, 1787, 1960, 2352, 2940, 3574, 3920, 5361, 5880, 7148, 8935, 10722, 11760, 12509, 14296, 17870, 21444, 25018, 26805, 28592, 35740, 37527, 42888, 50036, 53610, 62545, 71480, 75054, 85776, 87563, 100072, 107220, 125090, 142960, 150108, 175126, 187635, 200144, 214440, 250180, 262689, 300216, 350252, 375270, 428880, 437815, 500360, 525378, 600432, 700504, 750540, 875630, 1000720, 1050756, 1313445, 1401008, 1501080, 1751260, 2101512, 2626890, 3002160, 3502520, 4203024, 5253780, 7005040, 10507560, 21015120]

約数ペア:

[(1, 21015120), (2, 10507560), (3, 7005040), (4, 5253780), (5, 4203024), (6, 3502520), (7, 3002160), (8, 2626890), (10, 2101512), (12, 1751260), (14, 1501080), (15, 1401008), (16, 1313445), (20, 1050756), (21, 1000720), (24, 875630), (28, 750540), (30, 700504), (35, 600432), (40, 525378), (42, 500360), (48, 437815), (49, 428880), (56, 375270), (60, 350252), (70, 300216), (80, 262689), (84, 250180), (98, 214440), (105, 200144), (112, 187635), (120, 175126), (140, 150108), (147, 142960), (168, 125090), (196, 107220), (210, 100072), (240, 87563), (245, 85776), (280, 75054), (294, 71480), (336, 62545), (392, 53610), (420, 50036), (490, 42888), (560, 37527), (588, 35740), (735, 28592), (784, 26805), (840, 25018), (980, 21444), (1176, 17870), (1470, 14296), (1680, 12509), (1787, 11760), (1960, 10722), (2352, 8935), (2940, 7148), (3574, 5880), (3920, 5361)]