19711978

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{439}}^1$

素因数の和:622

約数の個数: 32

約数和(自身を含む): 35038080

約数和(自身を除く): 15326102

約数列:

[1, 2, 11, 13, 22, 26, 143, 157, 286, 314, 439, 878, 1727, 2041, 3454, 4082, 4829, 5707, 9658, 11414, 22451, 44902, 62777, 68923, 125554, 137846, 758153, 895999, 1516306, 1791998, 9855989, 19711978]

約数ペア:

[(1, 19711978), (2, 9855989), (11, 1791998), (13, 1516306), (22, 895999), (26, 758153), (143, 137846), (157, 125554), (286, 68923), (314, 62777), (439, 44902), (878, 22451), (1727, 11414), (2041, 9658), (3454, 5707), (4082, 4829)]