18745989

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{181}}^1$

素因数の和:305

約数の個数: 32

約数和(自身を含む): 27955200

約数和(自身を除く): 9209211

約数列:

[1, 3, 19, 23, 57, 69, 79, 181, 237, 437, 543, 1311, 1501, 1817, 3439, 4163, 4503, 5451, 10317, 12489, 14299, 34523, 42897, 79097, 103569, 237291, 271681, 328877, 815043, 986631, 6248663, 18745989]

約数ペア:

[(1, 18745989), (3, 6248663), (19, 986631), (23, 815043), (57, 328877), (69, 271681), (79, 237291), (181, 103569), (237, 79097), (437, 42897), (543, 34523), (1311, 14299), (1501, 12489), (1817, 10317), (3439, 5451), (4163, 4503)]