18307989

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4093}}^1$

素因数の和:4177

約数の個数: 24

約数和(自身を含む): 30655872

約数和(自身を除く): 12347883

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4093, 4473, 12279, 28651, 36837, 85953, 257859, 290603, 871809, 2034221, 2615427, 6102663, 18307989]

約数ペア:

[(1, 18307989), (3, 6102663), (7, 2615427), (9, 2034221), (21, 871809), (63, 290603), (71, 257859), (213, 85953), (497, 36837), (639, 28651), (1491, 12279), (4093, 4473)]