21155918

素因数分解:

$2^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{36857}}^1$

素因数の和:36907

約数の個数: 16

約数和(自身を含む): 37152864

約数和(自身を除く): 15996946

約数列:

[1, 2, 7, 14, 41, 82, 287, 574, 36857, 73714, 257999, 515998, 1511137, 3022274, 10577959, 21155918]

約数ペア:

[(1, 21155918), (2, 10577959), (7, 3022274), (14, 1511137), (41, 515998), (82, 257999), (287, 73714), (574, 36857)]