19680921

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{1193}}^1$

素因数の和:1262

約数の個数: 32

約数和(自身を含む): 32094720

約数和(自身を除く): 12413799

約数列:

[1, 3, 9, 13, 27, 39, 47, 117, 141, 351, 423, 611, 1193, 1269, 1833, 3579, 5499, 10737, 15509, 16497, 32211, 46527, 56071, 139581, 168213, 418743, 504639, 728923, 1513917, 2186769, 6560307, 19680921]

約数ペア:

[(1, 19680921), (3, 6560307), (9, 2186769), (13, 1513917), (27, 728923), (39, 504639), (47, 418743), (117, 168213), (141, 139581), (351, 56071), (423, 46527), (611, 32211), (1193, 16497), (1269, 15509), (1833, 10737), (3579, 5499)]