21091293

素因数分解:

$3^3\times {\mathrm{503}}^1\times {\mathrm{1553}}^1$

素因数の和:2065

約数の個数: 16

約数和(自身を含む): 31328640

約数和(自身を除く): 10237347

約数列:

[1, 3, 9, 27, 503, 1509, 1553, 4527, 4659, 13581, 13977, 41931, 781159, 2343477, 7030431, 21091293]

約数ペア:

[(1, 21091293), (3, 7030431), (9, 2343477), (27, 781159), (503, 41931), (1509, 13977), (1553, 13581), (4527, 4659)]