81581800

素因数分解:

$2^3\times 5^2\times {\mathrm{41}}^1\times {\mathrm{9949}}^1$

素因数の和:10006

約数の個数: 48

約数和(自身を含む): 194323500

約数和(自身を除く): 112741700

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 41, 50, 82, 100, 164, 200, 205, 328, 410, 820, 1025, 1640, 2050, 4100, 8200, 9949, 19898, 39796, 49745, 79592, 99490, 198980, 248725, 397960, 407909, 497450, 815818, 994900, 1631636, 1989800, 2039545, 3263272, 4079090, 8158180, 10197725, 16316360, 20395450, 40790900, 81581800]

約数ペア:

[(1, 81581800), (2, 40790900), (4, 20395450), (5, 16316360), (8, 10197725), (10, 8158180), (20, 4079090), (25, 3263272), (40, 2039545), (41, 1989800), (50, 1631636), (82, 994900), (100, 815818), (164, 497450), (200, 407909), (205, 397960), (328, 248725), (410, 198980), (820, 99490), (1025, 79592), (1640, 49745), (2050, 39796), (4100, 19898), (8200, 9949)]