21380841

素因数分解:

$3^6\times {\mathrm{139}}^1\times {\mathrm{211}}^1$

素因数の和:368

約数の個数: 28

約数和(自身を含む): 32440240

約数和(自身を除く): 11059399

約数列:

[1, 3, 9, 27, 81, 139, 211, 243, 417, 633, 729, 1251, 1899, 3753, 5697, 11259, 17091, 29329, 33777, 51273, 87987, 101331, 153819, 263961, 791883, 2375649, 7126947, 21380841]

約数ペア:

[(1, 21380841), (3, 7126947), (9, 2375649), (27, 791883), (81, 263961), (139, 153819), (211, 101331), (243, 87987), (417, 51273), (633, 33777), (729, 29329), (1251, 17091), (1899, 11259), (3753, 5697)]