17986787

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{103}}^1$

素因数の和:243

約数の個数: 32

約数和(自身を含む): 23761920

約数和(自身を除く): 5775133

約数列:

[1, 7, 13, 19, 91, 101, 103, 133, 247, 707, 721, 1313, 1339, 1729, 1919, 1957, 9191, 9373, 10403, 13433, 13699, 24947, 25441, 72821, 135239, 174629, 178087, 197657, 946673, 1383599, 2569541, 17986787]

約数ペア:

[(1, 17986787), (7, 2569541), (13, 1383599), (19, 946673), (91, 197657), (101, 178087), (103, 174629), (133, 135239), (247, 72821), (707, 25441), (721, 24947), (1313, 13699), (1339, 13433), (1729, 10403), (1919, 9373), (1957, 9191)]