21657909

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79333}}^1$

素因数の和:79356

約数の個数: 16

約数和(自身を含む): 35541632

約数和(自身を除く): 13883723

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 79333, 237999, 555331, 1031329, 1665993, 3093987, 7219303, 21657909]

約数ペア:

[(1, 21657909), (3, 7219303), (7, 3093987), (13, 1665993), (21, 1031329), (39, 555331), (91, 237999), (273, 79333)]