21110991

素因数分解:

$3^1\times {\mathrm{11}}^3\times {\mathrm{17}}^1\times {\mathrm{311}}^1$

素因数の和:364

約数の個数: 32

約数和(自身を含む): 32887296

約数和(自身を除く): 11776305

約数列:

[1, 3, 11, 17, 33, 51, 121, 187, 311, 363, 561, 933, 1331, 2057, 3421, 3993, 5287, 6171, 10263, 15861, 22627, 37631, 58157, 67881, 112893, 174471, 413941, 639727, 1241823, 1919181, 7036997, 21110991]

約数ペア:

[(1, 21110991), (3, 7036997), (11, 1919181), (17, 1241823), (33, 639727), (51, 413941), (121, 174471), (187, 112893), (311, 67881), (363, 58157), (561, 37631), (933, 22627), (1331, 15861), (2057, 10263), (3421, 6171), (3993, 5287)]