20815521

素因数分解:

$3^1\times {\mathrm{97}}^1\times {\mathrm{233}}^1\times {\mathrm{307}}^1$

素因数の和:640

約数の個数: 16

約数和(自身を含む): 28252224

約数和(自身を除く): 7436703

約数列:

[1, 3, 97, 233, 291, 307, 699, 921, 22601, 29779, 67803, 71531, 89337, 214593, 6938507, 20815521]

約数ペア:

[(1, 20815521), (3, 6938507), (97, 214593), (233, 89337), (291, 71531), (307, 67803), (699, 29779), (921, 22601)]