18004000

素因数分解:

$2^5\times 5^3\times 7^1\times {\mathrm{643}}^1$

素因数の和:675

約数の個数: 96

約数和(自身を含む): 50633856

約数和(自身を除く): 32629856

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 32, 35, 40, 50, 56, 70, 80, 100, 112, 125, 140, 160, 175, 200, 224, 250, 280, 350, 400, 500, 560, 643, 700, 800, 875, 1000, 1120, 1286, 1400, 1750, 2000, 2572, 2800, 3215, 3500, 4000, 4501, 5144, 5600, 6430, 7000, 9002, 10288, 12860, 14000, 16075, 18004, 20576, 22505, 25720, 28000, 32150, 36008, 45010, 51440, 64300, 72016, 80375, 90020, 102880, 112525, 128600, 144032, 160750, 180040, 225050, 257200, 321500, 360080, 450100, 514400, 562625, 643000, 720160, 900200, 1125250, 1286000, 1800400, 2250500, 2572000, 3600800, 4501000, 9002000, 18004000]

約数ペア:

[(1, 18004000), (2, 9002000), (4, 4501000), (5, 3600800), (7, 2572000), (8, 2250500), (10, 1800400), (14, 1286000), (16, 1125250), (20, 900200), (25, 720160), (28, 643000), (32, 562625), (35, 514400), (40, 450100), (50, 360080), (56, 321500), (70, 257200), (80, 225050), (100, 180040), (112, 160750), (125, 144032), (140, 128600), (160, 112525), (175, 102880), (200, 90020), (224, 80375), (250, 72016), (280, 64300), (350, 51440), (400, 45010), (500, 36008), (560, 32150), (643, 28000), (700, 25720), (800, 22505), (875, 20576), (1000, 18004), (1120, 16075), (1286, 14000), (1400, 12860), (1750, 10288), (2000, 9002), (2572, 7000), (2800, 6430), (3215, 5600), (3500, 5144), (4000, 4501)]