20681997

素因数分解:

$3^1\times 7^1\times {\mathrm{757}}^1\times {\mathrm{1301}}^1$

素因数の和:2068

約数の個数: 16

約数和(自身を含む): 31581312

約数和(自身を除く): 10899315

約数列:

[1, 3, 7, 21, 757, 1301, 2271, 3903, 5299, 9107, 15897, 27321, 984857, 2954571, 6893999, 20681997]

約数ペア:

[(1, 20681997), (3, 6893999), (7, 2954571), (21, 984857), (757, 27321), (1301, 15897), (2271, 9107), (3903, 5299)]