20925639

素因数分解:

$3^2\times 7^1\times {\mathrm{193}}^1\times {\mathrm{1721}}^1$

素因数の和:1927

約数の個数: 24

約数和(自身を含む): 34743072

約数和(自身を除く): 13817433

約数列:

[1, 3, 7, 9, 21, 63, 193, 579, 1351, 1721, 1737, 4053, 5163, 12047, 12159, 15489, 36141, 108423, 332153, 996459, 2325071, 2989377, 6975213, 20925639]

約数ペア:

[(1, 20925639), (3, 6975213), (7, 2989377), (9, 2325071), (21, 996459), (63, 332153), (193, 108423), (579, 36141), (1351, 15489), (1721, 12159), (1737, 12047), (4053, 5163)]