20389831

素因数分解:

$7^2\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{181}}^1$

素因数の和:236

約数の個数: 36

約数和(自身を含む): 27594840

約数和(自身を除く): 7205009

約数列:

[1, 7, 11, 19, 49, 77, 121, 133, 181, 209, 539, 847, 931, 1267, 1463, 1991, 2299, 3439, 5929, 8869, 10241, 13937, 16093, 21901, 24073, 37829, 97559, 112651, 153307, 168511, 264803, 416119, 1073149, 1853621, 2912833, 20389831]

約数ペア:

[(1, 20389831), (7, 2912833), (11, 1853621), (19, 1073149), (49, 416119), (77, 264803), (121, 168511), (133, 153307), (181, 112651), (209, 97559), (539, 37829), (847, 24073), (931, 21901), (1267, 16093), (1463, 13937), (1991, 10241), (2299, 8869), (3439, 5929)]