20400800

素因数分解:

$2^5\times 5^2\times 7^1\times {\mathrm{3643}}^1$

素因数の和:3670

約数の個数: 72

約数和(自身を含む): 56933856

約数和(自身を除く): 36533056

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 32, 35, 40, 50, 56, 70, 80, 100, 112, 140, 160, 175, 200, 224, 280, 350, 400, 560, 700, 800, 1120, 1400, 2800, 3643, 5600, 7286, 14572, 18215, 25501, 29144, 36430, 51002, 58288, 72860, 91075, 102004, 116576, 127505, 145720, 182150, 204008, 255010, 291440, 364300, 408016, 510020, 582880, 637525, 728600, 816032, 1020040, 1275050, 1457200, 2040080, 2550100, 2914400, 4080160, 5100200, 10200400, 20400800]

約数ペア:

[(1, 20400800), (2, 10200400), (4, 5100200), (5, 4080160), (7, 2914400), (8, 2550100), (10, 2040080), (14, 1457200), (16, 1275050), (20, 1020040), (25, 816032), (28, 728600), (32, 637525), (35, 582880), (40, 510020), (50, 408016), (56, 364300), (70, 291440), (80, 255010), (100, 204008), (112, 182150), (140, 145720), (160, 127505), (175, 116576), (200, 102004), (224, 91075), (280, 72860), (350, 58288), (400, 51002), (560, 36430), (700, 29144), (800, 25501), (1120, 18215), (1400, 14572), (2800, 7286), (3643, 5600)]