19728681

素因数分解:

$3^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{15401}}^1$

素因数の和:15472

約数の個数: 16

約数和(自身を含む): 30557568

約数和(自身を除く): 10828887

約数列:

[1, 3, 7, 21, 61, 183, 427, 1281, 15401, 46203, 107807, 323421, 939461, 2818383, 6576227, 19728681]

約数ペア:

[(1, 19728681), (3, 6576227), (7, 2818383), (21, 939461), (61, 323421), (183, 107807), (427, 46203), (1281, 15401)]