21090881

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{1171}}^1$

素因数の和:1292

約数の個数: 16

約数和(自身を含む): 25202688

約数和(自身を除く): 4111807

約数列:

[1, 7, 31, 83, 217, 581, 1171, 2573, 8197, 18011, 36301, 97193, 254107, 680351, 3012983, 21090881]

約数ペア:

[(1, 21090881), (7, 3012983), (31, 680351), (83, 254107), (217, 97193), (581, 36301), (1171, 18011), (2573, 8197)]