20788180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{1789}}^1$

素因数の和:1888

約数の個数: 48

約数和(自身を含む): 50520960

約数和(自身を除く): 29732780

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 83, 140, 166, 332, 415, 581, 830, 1162, 1660, 1789, 2324, 2905, 3578, 5810, 7156, 8945, 11620, 12523, 17890, 25046, 35780, 50092, 62615, 125230, 148487, 250460, 296974, 593948, 742435, 1039409, 1484870, 2078818, 2969740, 4157636, 5197045, 10394090, 20788180]

約数ペア:

[(1, 20788180), (2, 10394090), (4, 5197045), (5, 4157636), (7, 2969740), (10, 2078818), (14, 1484870), (20, 1039409), (28, 742435), (35, 593948), (70, 296974), (83, 250460), (140, 148487), (166, 125230), (332, 62615), (415, 50092), (581, 35780), (830, 25046), (1162, 17890), (1660, 12523), (1789, 11620), (2324, 8945), (2905, 7156), (3578, 5810)]