21170889

素因数分解:

$3^6\times {\mathrm{113}}^1\times {\mathrm{257}}^1$

素因数の和:388

約数の個数: 28

約数和(自身を含む): 32147316

約数和(自身を除く): 10976427

約数列:

[1, 3, 9, 27, 81, 113, 243, 257, 339, 729, 771, 1017, 2313, 3051, 6939, 9153, 20817, 27459, 29041, 62451, 82377, 87123, 187353, 261369, 784107, 2352321, 7056963, 21170889]

約数ペア:

[(1, 21170889), (3, 7056963), (9, 2352321), (27, 784107), (81, 261369), (113, 187353), (243, 87123), (257, 82377), (339, 62451), (729, 29041), (771, 27459), (1017, 20817), (2313, 9153), (3051, 6939)]