20684769

素因数分解:

$3^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{103}}^1\times {\mathrm{131}}^1$

素因数の和:317

約数の個数: 32

約数和(自身を含む): 32507904

約数和(自身を除く): 11823135

約数列:

[1, 3, 7, 21, 73, 103, 131, 219, 309, 393, 511, 721, 917, 1533, 2163, 2751, 7519, 9563, 13493, 22557, 28689, 40479, 52633, 66941, 94451, 157899, 200823, 283353, 984989, 2954967, 6894923, 20684769]

約数ペア:

[(1, 20684769), (3, 6894923), (7, 2954967), (21, 984989), (73, 283353), (103, 200823), (131, 157899), (219, 94451), (309, 66941), (393, 52633), (511, 40479), (721, 28689), (917, 22557), (1533, 13493), (2163, 9563), (2751, 7519)]