21185213

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{3359}}^1$

素因数の和:3436

約数の個数: 16

約数和(自身を含む): 26127360

約数和(自身を除く): 4942147

約数列:

[1, 7, 17, 53, 119, 371, 901, 3359, 6307, 23513, 57103, 178027, 399721, 1246189, 3026459, 21185213]

約数ペア:

[(1, 21185213), (7, 3026459), (17, 1246189), (53, 399721), (119, 178027), (371, 57103), (901, 23513), (3359, 6307)]