21279861

素因数分解:

$3^3\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{409}}^1$

素因数の和:506

約数の個数: 32

約数和(自身を含む): 33062400

約数和(自身を除く): 11782539

約数列:

[1, 3, 9, 27, 41, 47, 123, 141, 369, 409, 423, 1107, 1227, 1269, 1927, 3681, 5781, 11043, 16769, 17343, 19223, 50307, 52029, 57669, 150921, 173007, 452763, 519021, 788143, 2364429, 7093287, 21279861]

約数ペア:

[(1, 21279861), (3, 7093287), (9, 2364429), (27, 788143), (41, 519021), (47, 452763), (123, 173007), (141, 150921), (369, 57669), (409, 52029), (423, 50307), (1107, 19223), (1227, 17343), (1269, 16769), (1927, 11043), (3681, 5781)]