19810791

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{733}}^1$

素因数の和:773

約数の個数: 64

約数和(自身を含む): 39459840

約数和(自身を除く): 19649049

約数列:

[1, 3, 7, 9, 11, 13, 21, 27, 33, 39, 63, 77, 91, 99, 117, 143, 189, 231, 273, 297, 351, 429, 693, 733, 819, 1001, 1287, 2079, 2199, 2457, 3003, 3861, 5131, 6597, 8063, 9009, 9529, 15393, 19791, 24189, 27027, 28587, 46179, 56441, 66703, 72567, 85761, 104819, 138537, 169323, 200109, 217701, 257283, 314457, 507969, 600327, 733733, 943371, 1523907, 1800981, 2201199, 2830113, 6603597, 19810791]

約数ペア:

[(1, 19810791), (3, 6603597), (7, 2830113), (9, 2201199), (11, 1800981), (13, 1523907), (21, 943371), (27, 733733), (33, 600327), (39, 507969), (63, 314457), (77, 257283), (91, 217701), (99, 200109), (117, 169323), (143, 138537), (189, 104819), (231, 85761), (273, 72567), (297, 66703), (351, 56441), (429, 46179), (693, 28587), (733, 27027), (819, 24189), (1001, 19791), (1287, 15393), (2079, 9529), (2199, 9009), (2457, 8063), (3003, 6597), (3861, 5131)]