21197787

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{28607}}^1$

素因数の和:28642

約数の個数: 16

約数和(自身を含む): 32040960

約数和(自身を除く): 10843173

約数列:

[1, 3, 13, 19, 39, 57, 247, 741, 28607, 85821, 371891, 543533, 1115673, 1630599, 7065929, 21197787]

約数ペア:

[(1, 21197787), (3, 7065929), (13, 1630599), (19, 1115673), (39, 543533), (57, 371891), (247, 85821), (741, 28607)]