18916947

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{6983}}^1$

素因数の和:7039

約数の個数: 24

約数和(自身を含む): 31958784

約数和(自身を除く): 13041837

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709, 6983, 20949, 48881, 62847, 146643, 300269, 439929, 900807, 2101883, 2702421, 6305649, 18916947]

約数ペア:

[(1, 18916947), (3, 6305649), (7, 2702421), (9, 2101883), (21, 900807), (43, 439929), (63, 300269), (129, 146643), (301, 62847), (387, 48881), (903, 20949), (2709, 6983)]