18720849

素因数分解:

$3^1\times 7^1\times {\mathrm{173}}^1\times {\mathrm{5153}}^1$

素因数の和:5336

約数の個数: 16

約数和(自身を含む): 28697472

約数和(自身を除く): 9976623

約数列:

[1, 3, 7, 21, 173, 519, 1211, 3633, 5153, 15459, 36071, 108213, 891469, 2674407, 6240283, 18720849]

約数ペア:

[(1, 18720849), (3, 6240283), (7, 2674407), (21, 891469), (173, 108213), (519, 36071), (1211, 15459), (3633, 5153)]