20989683

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{347}}^1$

素因数の和:424

約数の個数: 48

約数和(自身を含む): 36481536

約数和(自身を除く): 15491853

約数列:

[1, 3, 9, 11, 13, 33, 39, 47, 99, 117, 141, 143, 347, 423, 429, 517, 611, 1041, 1287, 1551, 1833, 3123, 3817, 4511, 4653, 5499, 6721, 11451, 13533, 16309, 20163, 34353, 40599, 48927, 49621, 60489, 146781, 148863, 179399, 212017, 446589, 538197, 636051, 1614591, 1908153, 2332187, 6996561, 20989683]

約数ペア:

[(1, 20989683), (3, 6996561), (9, 2332187), (11, 1908153), (13, 1614591), (33, 636051), (39, 538197), (47, 446589), (99, 212017), (117, 179399), (141, 148863), (143, 146781), (347, 60489), (423, 49621), (429, 48927), (517, 40599), (611, 34353), (1041, 20163), (1287, 16309), (1551, 13533), (1833, 11451), (3123, 6721), (3817, 5499), (4511, 4653)]