21354915

素因数分解:

$3^1\times 5^1\times {\mathrm{641}}^1\times {\mathrm{2221}}^1$

素因数の和:2870

約数の個数: 16

約数和(自身を含む): 34236576

約数和(自身を除く): 12881661

約数列:

[1, 3, 5, 15, 641, 1923, 2221, 3205, 6663, 9615, 11105, 33315, 1423661, 4270983, 7118305, 21354915]

約数ペア:

[(1, 21354915), (3, 7118305), (5, 4270983), (15, 1423661), (641, 33315), (1923, 11105), (2221, 9615), (3205, 6663)]