20990178

素因数分解:

$2^1\times 3^4\times {\mathrm{11}}^1\times {\mathrm{11779}}^1$

素因数の和:11804

約数の個数: 40

約数和(自身を含む): 51313680

約数和(自身を除く): 30323502

約数列:

[1, 2, 3, 6, 9, 11, 18, 22, 27, 33, 54, 66, 81, 99, 162, 198, 297, 594, 891, 1782, 11779, 23558, 35337, 70674, 106011, 129569, 212022, 259138, 318033, 388707, 636066, 777414, 954099, 1166121, 1908198, 2332242, 3498363, 6996726, 10495089, 20990178]

約数ペア:

[(1, 20990178), (2, 10495089), (3, 6996726), (6, 3498363), (9, 2332242), (11, 1908198), (18, 1166121), (22, 954099), (27, 777414), (33, 636066), (54, 388707), (66, 318033), (81, 259138), (99, 212022), (162, 129569), (198, 106011), (297, 70674), (594, 35337), (891, 23558), (1782, 11779)]