20616400

素因数分解:

$2^4\times 5^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{199}}^1$

素因数の和:261

約数の個数: 120

約数和(自身を含む): 58428800

約数和(自身を除く): 37812400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 35, 37, 40, 50, 56, 70, 74, 80, 100, 112, 140, 148, 175, 185, 199, 200, 259, 280, 296, 350, 370, 398, 400, 518, 560, 592, 700, 740, 796, 925, 995, 1036, 1295, 1393, 1400, 1480, 1592, 1850, 1990, 2072, 2590, 2786, 2800, 2960, 3184, 3700, 3980, 4144, 4975, 5180, 5572, 6475, 6965, 7363, 7400, 7960, 9950, 10360, 11144, 12950, 13930, 14726, 14800, 15920, 19900, 20720, 22288, 25900, 27860, 29452, 34825, 36815, 39800, 51541, 51800, 55720, 58904, 69650, 73630, 79600, 103082, 103600, 111440, 117808, 139300, 147260, 184075, 206164, 257705, 278600, 294520, 368150, 412328, 515410, 557200, 589040, 736300, 824656, 1030820, 1288525, 1472600, 2061640, 2577050, 2945200, 4123280, 5154100, 10308200, 20616400]

約数ペア:

[(1, 20616400), (2, 10308200), (4, 5154100), (5, 4123280), (7, 2945200), (8, 2577050), (10, 2061640), (14, 1472600), (16, 1288525), (20, 1030820), (25, 824656), (28, 736300), (35, 589040), (37, 557200), (40, 515410), (50, 412328), (56, 368150), (70, 294520), (74, 278600), (80, 257705), (100, 206164), (112, 184075), (140, 147260), (148, 139300), (175, 117808), (185, 111440), (199, 103600), (200, 103082), (259, 79600), (280, 73630), (296, 69650), (350, 58904), (370, 55720), (398, 51800), (400, 51541), (518, 39800), (560, 36815), (592, 34825), (700, 29452), (740, 27860), (796, 25900), (925, 22288), (995, 20720), (1036, 19900), (1295, 15920), (1393, 14800), (1400, 14726), (1480, 13930), (1592, 12950), (1850, 11144), (1990, 10360), (2072, 9950), (2590, 7960), (2786, 7400), (2800, 7363), (2960, 6965), (3184, 6475), (3700, 5572), (3980, 5180), (4144, 4975)]