21220563

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{77731}}^1$

素因数の和:77754

約数の個数: 16

約数和(自身を含む): 34823936

約数和(自身を除く): 13603373

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 77731, 233193, 544117, 1010503, 1632351, 3031509, 7073521, 21220563]

約数ペア:

[(1, 21220563), (3, 7073521), (7, 3031509), (13, 1632351), (21, 1010503), (39, 544117), (91, 233193), (273, 77731)]