21787029

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{673}}^1$

素因数の和:802

約数の個数: 32

約数和(自身を含む): 35587200

約数和(自身を除く): 13800171

約数列:

[1, 3, 9, 11, 27, 33, 99, 109, 297, 327, 673, 981, 1199, 2019, 2943, 3597, 6057, 7403, 10791, 18171, 22209, 32373, 66627, 73357, 199881, 220071, 660213, 806927, 1980639, 2420781, 7262343, 21787029]

約数ペア:

[(1, 21787029), (3, 7262343), (9, 2420781), (11, 1980639), (27, 806927), (33, 660213), (99, 220071), (109, 199881), (297, 73357), (327, 66627), (673, 32373), (981, 22209), (1199, 18171), (2019, 10791), (2943, 7403), (3597, 6057)]