21558291

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{397}}^1\times {\mathrm{787}}^1$

素因数の和:1210

約数の個数: 16

約数和(自身を含む): 30107904

約数和(自身を除く): 8549613

約数列:

[1, 3, 23, 69, 397, 787, 1191, 2361, 9131, 18101, 27393, 54303, 312439, 937317, 7186097, 21558291]

約数ペア:

[(1, 21558291), (3, 7186097), (23, 937317), (69, 312439), (397, 54303), (787, 27393), (1191, 18101), (2361, 9131)]