19815862

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{20947}}^1$

素因数の和:21003

約数の個数: 16

約数和(自身を含む): 33181632

約数和(自身を除く): 13365770

約数列:

[1, 2, 11, 22, 43, 86, 473, 946, 20947, 41894, 230417, 460834, 900721, 1801442, 9907931, 19815862]

約数ペア:

[(1, 19815862), (2, 9907931), (11, 1801442), (22, 900721), (43, 460834), (86, 230417), (473, 41894), (946, 20947)]