20510139

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{311}}^1$

素因数の和:435

約数の個数: 32

約数和(自身を含む): 31449600

約数和(自身を除く): 10939461

約数列:

[1, 3, 13, 19, 39, 57, 89, 247, 267, 311, 741, 933, 1157, 1691, 3471, 4043, 5073, 5909, 12129, 17727, 21983, 27679, 65949, 76817, 83037, 230451, 359827, 525901, 1079481, 1577703, 6836713, 20510139]

約数ペア:

[(1, 20510139), (3, 6836713), (13, 1577703), (19, 1079481), (39, 525901), (57, 359827), (89, 230451), (247, 83037), (267, 76817), (311, 65949), (741, 27679), (933, 21983), (1157, 17727), (1691, 12129), (3471, 5909), (4043, 5073)]