15993999

素因数分解:

$3^2\times 7^1\times {\mathrm{127}}^1\times {\mathrm{1999}}^1$

素因数の和:2139

約数の個数: 24

約数和(自身を含む): 26624000

約数和(自身を除く): 10630001

約数列:

[1, 3, 7, 9, 21, 63, 127, 381, 889, 1143, 1999, 2667, 5997, 8001, 13993, 17991, 41979, 125937, 253873, 761619, 1777111, 2284857, 5331333, 15993999]

約数ペア:

[(1, 15993999), (3, 5331333), (7, 2284857), (9, 1777111), (21, 761619), (63, 253873), (127, 125937), (381, 41979), (889, 17991), (1143, 13993), (1999, 8001), (2667, 5997)]