20906787

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{449}}^1$

素因数の和:563

約数の個数: 32

約数和(自身を含む): 32659200

約数和(自身を除く): 11752413

約数列:

[1, 3, 11, 17, 33, 51, 83, 187, 249, 449, 561, 913, 1347, 1411, 2739, 4233, 4939, 7633, 14817, 15521, 22899, 37267, 46563, 83963, 111801, 251889, 409937, 633539, 1229811, 1900617, 6968929, 20906787]

約数ペア:

[(1, 20906787), (3, 6968929), (11, 1900617), (17, 1229811), (33, 633539), (51, 409937), (83, 251889), (187, 111801), (249, 83963), (449, 46563), (561, 37267), (913, 22899), (1347, 15521), (1411, 14817), (2739, 7633), (4233, 4939)]