20644393

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{137}}^1$

素因数の和:277

約数の個数: 32

約数和(自身を含む): 27555840

約数和(自身を除く): 6911447

約数列:

[1, 7, 11, 19, 77, 103, 133, 137, 209, 721, 959, 1133, 1463, 1507, 1957, 2603, 7931, 10549, 13699, 14111, 18221, 21527, 28633, 98777, 150689, 155221, 200431, 268109, 1086547, 1876763, 2949199, 20644393]

約数ペア:

[(1, 20644393), (7, 2949199), (11, 1876763), (19, 1086547), (77, 268109), (103, 200431), (133, 155221), (137, 150689), (209, 98777), (721, 28633), (959, 21527), (1133, 18221), (1463, 14111), (1507, 13699), (1957, 10549), (2603, 7931)]