19866951

素因数分解:

$3^5\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{331}}^1$

素因数の和:378

約数の個数: 48

約数和(自身を含む): 33837440

約数和(自身を除く): 13970489

約数列:

[1, 3, 9, 13, 19, 27, 39, 57, 81, 117, 171, 243, 247, 331, 351, 513, 741, 993, 1053, 1539, 2223, 2979, 3159, 4303, 4617, 6289, 6669, 8937, 12909, 18867, 20007, 26811, 38727, 56601, 60021, 80433, 81757, 116181, 169803, 245271, 348543, 509409, 735813, 1045629, 1528227, 2207439, 6622317, 19866951]

約数ペア:

[(1, 19866951), (3, 6622317), (9, 2207439), (13, 1528227), (19, 1045629), (27, 735813), (39, 509409), (57, 348543), (81, 245271), (117, 169803), (171, 116181), (243, 81757), (247, 80433), (331, 60021), (351, 56601), (513, 38727), (741, 26811), (993, 20007), (1053, 18867), (1539, 12909), (2223, 8937), (2979, 6669), (3159, 6289), (4303, 4617)]