21489921

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{46819}}^1$

素因数の和:46845

約数の個数: 16

約数和(自身を含む): 33710400

約数和(自身を除く): 12220479

約数列:

[1, 3, 9, 17, 27, 51, 153, 459, 46819, 140457, 421371, 795923, 1264113, 2387769, 7163307, 21489921]

約数ペア:

[(1, 21489921), (3, 7163307), (9, 2387769), (17, 1264113), (27, 795923), (51, 421371), (153, 140457), (459, 46819)]