20690943

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{3989}}^1$

素因数の和:4031

約数の個数: 32

約数和(自身を含む): 35750400

約数和(自身を除く): 15059457

約数列:

[1, 3, 7, 13, 19, 21, 39, 57, 91, 133, 247, 273, 399, 741, 1729, 3989, 5187, 11967, 27923, 51857, 75791, 83769, 155571, 227373, 362999, 530537, 985283, 1088997, 1591611, 2955849, 6896981, 20690943]

約数ペア:

[(1, 20690943), (3, 6896981), (7, 2955849), (13, 1591611), (19, 1088997), (21, 985283), (39, 530537), (57, 362999), (91, 227373), (133, 155571), (247, 83769), (273, 75791), (399, 51857), (741, 27923), (1729, 11967), (3989, 5187)]