138439989

素因数分解:

$3^3\times {\mathrm{71}}^1\times {\mathrm{257}}^1\times {\mathrm{281}}^1$

素因数の和:618

約数の個数: 32

約数和(自身を含む): 209537280

約数和(自身を除く): 71097291

約数列:

[1, 3, 9, 27, 71, 213, 257, 281, 639, 771, 843, 1917, 2313, 2529, 6939, 7587, 18247, 19951, 54741, 59853, 72217, 164223, 179559, 216651, 492669, 538677, 649953, 1949859, 5127407, 15382221, 46146663, 138439989]

約数ペア:

[(1, 138439989), (3, 46146663), (9, 15382221), (27, 5127407), (71, 1949859), (213, 649953), (257, 538677), (281, 492669), (639, 216651), (771, 179559), (843, 164223), (1917, 72217), (2313, 59853), (2529, 54741), (6939, 19951), (7587, 18247)]