20898009

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{29}}^2\times {\mathrm{251}}^1$

素因数の和:326

約数の個数: 36

約数和(自身を含む): 34240752

約数和(自身を除く): 13342743

約数列:

[1, 3, 9, 11, 29, 33, 87, 99, 251, 261, 319, 753, 841, 957, 2259, 2523, 2761, 2871, 7279, 7569, 8283, 9251, 21837, 24849, 27753, 65511, 80069, 83259, 211091, 240207, 633273, 720621, 1899819, 2322001, 6966003, 20898009]

約数ペア:

[(1, 20898009), (3, 6966003), (9, 2322001), (11, 1899819), (29, 720621), (33, 633273), (87, 240207), (99, 211091), (251, 83259), (261, 80069), (319, 65511), (753, 27753), (841, 24849), (957, 21837), (2259, 9251), (2523, 8283), (2761, 7569), (2871, 7279)]