21519393

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{23831}}^1$

素因数の和:23884

約数の個数: 16

約数和(自身を含む): 33555456

約数和(自身を除く): 12036063

約数列:

[1, 3, 7, 21, 43, 129, 301, 903, 23831, 71493, 166817, 500451, 1024733, 3074199, 7173131, 21519393]

約数ペア:

[(1, 21519393), (3, 7173131), (7, 3074199), (21, 1024733), (43, 500451), (129, 166817), (301, 71493), (903, 23831)]