20306781

素因数分解:

$3^5\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1$

素因数の和:204

約数の個数: 48

約数和(自身を含む): 33965568

約数和(自身を除く): 13658787

約数列:

[1, 3, 9, 11, 27, 33, 71, 81, 99, 107, 213, 243, 297, 321, 639, 781, 891, 963, 1177, 1917, 2343, 2673, 2889, 3531, 5751, 7029, 7597, 8667, 10593, 17253, 21087, 22791, 26001, 31779, 63261, 68373, 83567, 95337, 189783, 205119, 250701, 286011, 615357, 752103, 1846071, 2256309, 6768927, 20306781]

約数ペア:

[(1, 20306781), (3, 6768927), (9, 2256309), (11, 1846071), (27, 752103), (33, 615357), (71, 286011), (81, 250701), (99, 205119), (107, 189783), (213, 95337), (243, 83567), (297, 68373), (321, 63261), (639, 31779), (781, 26001), (891, 22791), (963, 21087), (1177, 17253), (1917, 10593), (2343, 8667), (2673, 7597), (2889, 7029), (3531, 5751)]