1291221

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{839}}^1$

素因数の和:870

約数の個数: 20

約数和(自身を含む): 2032800

約数和(自身を除く): 741579

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 513, 839, 1539, 2517, 7551, 15941, 22653, 47823, 67959, 143469, 430407, 1291221]

約数ペア:

[(1, 1291221), (3, 430407), (9, 143469), (19, 67959), (27, 47823), (57, 22653), (81, 15941), (171, 7551), (513, 2517), (839, 1539)]