21188885

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{3511}}^1$

素因数の和:3604

約数の個数: 16

約数和(自身を含む): 27309312

約数和(自身を除く): 6120427

約数列:

[1, 5, 17, 71, 85, 355, 1207, 3511, 6035, 17555, 59687, 249281, 298435, 1246405, 4237777, 21188885]

約数ペア:

[(1, 21188885), (5, 4237777), (17, 1246405), (71, 298435), (85, 249281), (355, 59687), (1207, 17555), (3511, 6035)]