20920977

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{347}}^1$

素因数の和:403

約数の個数: 64

約数和(自身を含む): 40089600

約数和(自身を除く): 19168623

約数列:

[1, 3, 7, 9, 11, 21, 27, 29, 33, 63, 77, 87, 99, 189, 203, 231, 261, 297, 319, 347, 609, 693, 783, 957, 1041, 1827, 2079, 2233, 2429, 2871, 3123, 3817, 5481, 6699, 7287, 8613, 9369, 10063, 11451, 20097, 21861, 26719, 30189, 34353, 60291, 65583, 70441, 80157, 90567, 103059, 110693, 211323, 240471, 271701, 332079, 633969, 721413, 774851, 996237, 1901907, 2324553, 2988711, 6973659, 20920977]

約数ペア:

[(1, 20920977), (3, 6973659), (7, 2988711), (9, 2324553), (11, 1901907), (21, 996237), (27, 774851), (29, 721413), (33, 633969), (63, 332079), (77, 271701), (87, 240471), (99, 211323), (189, 110693), (203, 103059), (231, 90567), (261, 80157), (297, 70441), (319, 65583), (347, 60291), (609, 34353), (693, 30189), (783, 26719), (957, 21861), (1041, 20097), (1827, 11451), (2079, 10063), (2233, 9369), (2429, 8613), (2871, 7287), (3123, 6699), (3817, 5481)]