21281277

素因数分解:

$3^1\times {\mathrm{67}}^1\times {\mathrm{239}}^1\times {\mathrm{443}}^1$

素因数の和:752

約数の個数: 16

約数和(自身を含む): 28984320

約数和(自身を除く): 7703043

約数列:

[1, 3, 67, 201, 239, 443, 717, 1329, 16013, 29681, 48039, 89043, 105877, 317631, 7093759, 21281277]

約数ペア:

[(1, 21281277), (3, 7093759), (67, 317631), (201, 105877), (239, 89043), (443, 48039), (717, 29681), (1329, 16013)]