21396489

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{311}}^1$

素因数の和:421

約数の個数: 32

約数和(自身を含む): 32348160

約数和(自身を除く): 10951671

約数列:

[1, 3, 17, 19, 51, 57, 71, 213, 311, 323, 933, 969, 1207, 1349, 3621, 4047, 5287, 5909, 15861, 17727, 22081, 22933, 66243, 68799, 100453, 301359, 375377, 419539, 1126131, 1258617, 7132163, 21396489]

約数ペア:

[(1, 21396489), (3, 7132163), (17, 1258617), (19, 1126131), (51, 419539), (57, 375377), (71, 301359), (213, 100453), (311, 68799), (323, 66243), (933, 22933), (969, 22081), (1207, 17727), (1349, 15861), (3621, 5909), (4047, 5287)]