19997967

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{829}}^1$

素因数の和:903

約数の個数: 32

約数和(自身を含む): 31553280

約数和(自身を除く): 11555313

約数列:

[1, 3, 11, 17, 33, 43, 51, 129, 187, 473, 561, 731, 829, 1419, 2193, 2487, 8041, 9119, 14093, 24123, 27357, 35647, 42279, 106941, 155023, 392117, 465069, 605999, 1176351, 1817997, 6665989, 19997967]

約数ペア:

[(1, 19997967), (3, 6665989), (11, 1817997), (17, 1176351), (33, 605999), (43, 465069), (51, 392117), (129, 155023), (187, 106941), (473, 42279), (561, 35647), (731, 27357), (829, 24123), (1419, 14093), (2193, 9119), (2487, 8041)]