21084057

素因数分解:

$3^4\times {\mathrm{131}}^1\times {\mathrm{1987}}^1$

素因数の和:2130

約数の個数: 20

約数和(自身を含む): 31752336

約数和(自身を除く): 10668279

約数列:

[1, 3, 9, 27, 81, 131, 393, 1179, 1987, 3537, 5961, 10611, 17883, 53649, 160947, 260297, 780891, 2342673, 7028019, 21084057]

約数ペア:

[(1, 21084057), (3, 7028019), (9, 2342673), (27, 780891), (81, 260297), (131, 160947), (393, 53649), (1179, 17883), (1987, 10611), (3537, 5961)]