20574891

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{461}}^1$

素因数の和:521

約数の個数: 40

約数和(自身を含む): 33541200

約数和(自身を除く): 12966309

約数列:

[1, 3, 9, 19, 27, 29, 57, 81, 87, 171, 261, 461, 513, 551, 783, 1383, 1539, 1653, 2349, 4149, 4959, 8759, 12447, 13369, 14877, 26277, 37341, 40107, 44631, 78831, 120321, 236493, 254011, 360963, 709479, 762033, 1082889, 2286099, 6858297, 20574891]

約数ペア:

[(1, 20574891), (3, 6858297), (9, 2286099), (19, 1082889), (27, 762033), (29, 709479), (57, 360963), (81, 254011), (87, 236493), (171, 120321), (261, 78831), (461, 44631), (513, 40107), (551, 37341), (783, 26277), (1383, 14877), (1539, 13369), (1653, 12447), (2349, 8759), (4149, 4959)]