19946979

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{997}}^1$

素因数の和:1041

約数の個数: 40

約数和(自身を含む): 33812240

約数和(自身を除く): 13865261

約数列:

[1, 3, 9, 13, 19, 27, 39, 57, 81, 117, 171, 247, 351, 513, 741, 997, 1053, 1539, 2223, 2991, 6669, 8973, 12961, 18943, 20007, 26919, 38883, 56829, 80757, 116649, 170487, 246259, 349947, 511461, 738777, 1049841, 1534383, 2216331, 6648993, 19946979]

約数ペア:

[(1, 19946979), (3, 6648993), (9, 2216331), (13, 1534383), (19, 1049841), (27, 738777), (39, 511461), (57, 349947), (81, 246259), (117, 170487), (171, 116649), (247, 80757), (351, 56829), (513, 38883), (741, 26919), (997, 20007), (1053, 18943), (1539, 12961), (2223, 8973), (2991, 6669)]