18778347

素因数分解:

$3^2\times 7^1\times {\mathrm{127}}^1\times {\mathrm{2347}}^1$

素因数の和:2487

約数の個数: 24

約数和(自身を含む): 31256576

約数和(自身を除く): 12478229

約数列:

[1, 3, 7, 9, 21, 63, 127, 381, 889, 1143, 2347, 2667, 7041, 8001, 16429, 21123, 49287, 147861, 298069, 894207, 2086483, 2682621, 6259449, 18778347]

約数ペア:

[(1, 18778347), (3, 6259449), (7, 2682621), (9, 2086483), (21, 894207), (63, 298069), (127, 147861), (381, 49287), (889, 21123), (1143, 16429), (2347, 8001), (2667, 7041)]