20690984

素因数分解:

$2^3\times {\mathrm{23}}^1\times {\mathrm{139}}^1\times {\mathrm{809}}^1$

素因数の和:977

約数の個数: 32

約数和(自身を含む): 40824000

約数和(自身を除く): 20133016

約数列:

[1, 2, 4, 8, 23, 46, 92, 139, 184, 278, 556, 809, 1112, 1618, 3197, 3236, 6394, 6472, 12788, 18607, 25576, 37214, 74428, 112451, 148856, 224902, 449804, 899608, 2586373, 5172746, 10345492, 20690984]

約数ペア:

[(1, 20690984), (2, 10345492), (4, 5172746), (8, 2586373), (23, 899608), (46, 449804), (92, 224902), (139, 148856), (184, 112451), (278, 74428), (556, 37214), (809, 25576), (1112, 18607), (1618, 12788), (3197, 6472), (3236, 6394)]