21039459

素因数分解:

$3^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{16981}}^1$

素因数の和:17050

約数の個数: 16

約数和(自身を含む): 32605440

約数和(自身を除く): 11565981

約数列:

[1, 3, 7, 21, 59, 177, 413, 1239, 16981, 50943, 118867, 356601, 1001879, 3005637, 7013153, 21039459]

約数ペア:

[(1, 21039459), (3, 7013153), (7, 3005637), (21, 1001879), (59, 356601), (177, 118867), (413, 50943), (1239, 16981)]