21006391

素因数分解:

$7^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{1381}}^1$

素因数の和:1482

約数の個数: 16

約数和(自身を含む): 25075008

約数和(自身を除く): 4068617

約数列:

[1, 7, 41, 53, 287, 371, 1381, 2173, 9667, 15211, 56621, 73193, 396347, 512351, 3000913, 21006391]

約数ペア:

[(1, 21006391), (7, 3000913), (41, 512351), (53, 396347), (287, 73193), (371, 56621), (1381, 15211), (2173, 9667)]