20991339

素因数分解:

$3^3\times {\mathrm{53}}^1\times {\mathrm{14669}}^1$

素因数の和:14731

約数の個数: 16

約数和(自身を含む): 31687200

約数和(自身を除く): 10695861

約数列:

[1, 3, 9, 27, 53, 159, 477, 1431, 14669, 44007, 132021, 396063, 777457, 2332371, 6997113, 20991339]

約数ペア:

[(1, 20991339), (3, 6997113), (9, 2332371), (27, 777457), (53, 396063), (159, 132021), (477, 44007), (1431, 14669)]