20720931

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{271}}^1\times {\mathrm{331}}^1$

素因数の和:623

約数の個数: 32

約数和(自身を含む): 34676736

約数和(自身を除く): 13955805

約数列:

[1, 3, 7, 11, 21, 33, 77, 231, 271, 331, 813, 993, 1897, 2317, 2981, 3641, 5691, 6951, 8943, 10923, 20867, 25487, 62601, 76461, 89701, 269103, 627907, 986711, 1883721, 2960133, 6906977, 20720931]

約数ペア:

[(1, 20720931), (3, 6906977), (7, 2960133), (11, 1883721), (21, 986711), (33, 627907), (77, 269103), (231, 89701), (271, 76461), (331, 62601), (813, 25487), (993, 20867), (1897, 10923), (2317, 8943), (2981, 6951), (3641, 5691)]