20511813

素因数分解:

$3^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{7027}}^1$

素因数の和:7176

約数の個数: 16

約数和(自身を含む): 31485440

約数和(自身を除く): 10973627

約数列:

[1, 3, 7, 21, 139, 417, 973, 2919, 7027, 21081, 49189, 147567, 976753, 2930259, 6837271, 20511813]

約数ペア:

[(1, 20511813), (3, 6837271), (7, 2930259), (21, 976753), (139, 147567), (417, 49189), (973, 21081), (2919, 7027)]