21231909

素因数分解:

$3^3\times {\mathrm{113}}^1\times {\mathrm{6959}}^1$

素因数の和:7081

約数の個数: 16

約数和(自身を含む): 31737600

約数和(自身を除く): 10505691

約数列:

[1, 3, 9, 27, 113, 339, 1017, 3051, 6959, 20877, 62631, 187893, 786367, 2359101, 7077303, 21231909]

約数ペア:

[(1, 21231909), (3, 7077303), (9, 2359101), (27, 786367), (113, 187893), (339, 62631), (1017, 20877), (3051, 6959)]