21420278

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{22643}}^1$

素因数の和:22699

約数の個数: 16

約数和(自身を含む): 35868096

約数和(自身を除く): 14447818

約数列:

[1, 2, 11, 22, 43, 86, 473, 946, 22643, 45286, 249073, 498146, 973649, 1947298, 10710139, 21420278]

約数ペア:

[(1, 21420278), (2, 10710139), (11, 1947298), (22, 973649), (43, 498146), (86, 249073), (473, 45286), (946, 22643)]