19620981

素因数分解:

$3^3\times {\mathrm{59}}^1\times {\mathrm{109}}^1\times {\mathrm{113}}^1$

素因数の和:290

約数の個数: 32

約数和(自身を含む): 30096000

約数和(自身を除く): 10475019

約数列:

[1, 3, 9, 27, 59, 109, 113, 177, 327, 339, 531, 981, 1017, 1593, 2943, 3051, 6431, 6667, 12317, 19293, 20001, 36951, 57879, 60003, 110853, 173637, 180009, 332559, 726703, 2180109, 6540327, 19620981]

約数ペア:

[(1, 19620981), (3, 6540327), (9, 2180109), (27, 726703), (59, 332559), (109, 180009), (113, 173637), (177, 110853), (327, 60003), (339, 57879), (531, 36951), (981, 20001), (1017, 19293), (1593, 12317), (2943, 6667), (3051, 6431)]