20688777

素因数分解:

$3^5\times {\mathrm{19}}^1\times {\mathrm{4481}}^1$

素因数の和:4515

約数の個数: 24

約数和(自身を含む): 32628960

約数和(自身を除く): 11940183

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 243, 513, 1539, 4481, 4617, 13443, 40329, 85139, 120987, 255417, 362961, 766251, 1088883, 2298753, 6896259, 20688777]

約数ペア:

[(1, 20688777), (3, 6896259), (9, 2298753), (19, 1088883), (27, 766251), (57, 362961), (81, 255417), (171, 120987), (243, 85139), (513, 40329), (1539, 13443), (4481, 4617)]