18683721

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4177}}^1$

素因数の和:4261

約数の個数: 24

約数和(自身を含む): 31284864

約数和(自身を除く): 12601143

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4177, 4473, 12531, 29239, 37593, 87717, 263151, 296567, 889701, 2075969, 2669103, 6227907, 18683721]

約数ペア:

[(1, 18683721), (3, 6227907), (7, 2669103), (9, 2075969), (21, 889701), (63, 296567), (71, 263151), (213, 87717), (497, 37593), (639, 29239), (1491, 12531), (4177, 4473)]