20991054

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{499787}}^1$

素因数の和:499799

約数の個数: 16

約数和(自身を含む): 47979648

約数和(自身を除く): 26988594

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 499787, 999574, 1499361, 2998722, 3498509, 6997018, 10495527, 20991054]

約数ペア:

[(1, 20991054), (2, 10495527), (3, 6997018), (6, 3498509), (7, 2998722), (14, 1499361), (21, 999574), (42, 499787)]