19993989

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{307}}^1\times {\mathrm{1277}}^1$

素因数の和:1604

約数の個数: 16

約数和(自身を含む): 28340928

約数和(自身を除く): 8346939

約数列:

[1, 3, 17, 51, 307, 921, 1277, 3831, 5219, 15657, 21709, 65127, 392039, 1176117, 6664663, 19993989]

約数ペア:

[(1, 19993989), (3, 6664663), (17, 1176117), (51, 392039), (307, 65127), (921, 21709), (1277, 15657), (3831, 5219)]