21039489

素因数分解:

$3^2\times {\mathrm{17}}^2\times {\mathrm{8089}}^1$

素因数の和:8129

約数の個数: 18

約数和(自身を含む): 32287190

約数和(自身を除く): 11247701

約数列:

[1, 3, 9, 17, 51, 153, 289, 867, 2601, 8089, 24267, 72801, 137513, 412539, 1237617, 2337721, 7013163, 21039489]

約数ペア:

[(1, 21039489), (3, 7013163), (9, 2337721), (17, 1237617), (51, 412539), (153, 137513), (289, 72801), (867, 24267), (2601, 8089)]