20147967

素因数分解:

$3^3\times 7^2\times {\mathrm{97}}^1\times {\mathrm{157}}^1$

素因数の和:277

約数の個数: 48

約数和(自身を含む): 35303520

約数和(自身を除く): 15155553

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 97, 147, 157, 189, 291, 441, 471, 679, 873, 1099, 1323, 1413, 2037, 2619, 3297, 4239, 4753, 6111, 7693, 9891, 14259, 15229, 18333, 23079, 29673, 42777, 45687, 69237, 106603, 128331, 137061, 207711, 319809, 411183, 746221, 959427, 2238663, 2878281, 6715989, 20147967]

約数ペア:

[(1, 20147967), (3, 6715989), (7, 2878281), (9, 2238663), (21, 959427), (27, 746221), (49, 411183), (63, 319809), (97, 207711), (147, 137061), (157, 128331), (189, 106603), (291, 69237), (441, 45687), (471, 42777), (679, 29673), (873, 23079), (1099, 18333), (1323, 15229), (1413, 14259), (2037, 9891), (2619, 7693), (3297, 6111), (4239, 4753)]