19991961

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{811}}^1$

素因数の和:914

約数の個数: 32

約数和(自身を含む): 32739840

約数和(自身を除く): 12747879

約数列:

[1, 3, 9, 11, 27, 33, 83, 99, 249, 297, 747, 811, 913, 2241, 2433, 2739, 7299, 8217, 8921, 21897, 24651, 26763, 67313, 80289, 201939, 240867, 605817, 740443, 1817451, 2221329, 6663987, 19991961]

約数ペア:

[(1, 19991961), (3, 6663987), (9, 2221329), (11, 1817451), (27, 740443), (33, 605817), (83, 240867), (99, 201939), (249, 80289), (297, 67313), (747, 26763), (811, 24651), (913, 21897), (2241, 8921), (2433, 8217), (2739, 7299)]