21215961

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{1217}}^1$

素因数の和:1385

約数の個数: 24

約数和(自身を含む): 33251400

約数和(自身を除く): 12035439

約数列:

[1, 3, 9, 13, 39, 117, 149, 447, 1217, 1341, 1937, 3651, 5811, 10953, 15821, 17433, 47463, 142389, 181333, 543999, 1631997, 2357329, 7071987, 21215961]

約数ペア:

[(1, 21215961), (3, 7071987), (9, 2357329), (13, 1631997), (39, 543999), (117, 181333), (149, 142389), (447, 47463), (1217, 17433), (1341, 15821), (1937, 10953), (3651, 5811)]