21789903

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{199}}^1$

素因数の和:351

約数の個数: 32

約数和(自身を含む): 32832000

約数和(自身を除く): 11042097

約数列:

[1, 3, 17, 19, 51, 57, 113, 199, 323, 339, 597, 969, 1921, 2147, 3383, 3781, 5763, 6441, 10149, 11343, 22487, 36499, 64277, 67461, 109497, 192831, 382279, 427253, 1146837, 1281759, 7263301, 21789903]

約数ペア:

[(1, 21789903), (3, 7263301), (17, 1281759), (19, 1146837), (51, 427253), (57, 382279), (113, 192831), (199, 109497), (323, 67461), (339, 64277), (597, 36499), (969, 22487), (1921, 11343), (2147, 10149), (3383, 6441), (3781, 5763)]