21391898

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{22613}}^1$

素因数の和:22669

約数の個数: 16

約数和(自身を含む): 35820576

約数和(自身を除く): 14428678

約数列:

[1, 2, 11, 22, 43, 86, 473, 946, 22613, 45226, 248743, 497486, 972359, 1944718, 10695949, 21391898]

約数ペア:

[(1, 21391898), (2, 10695949), (11, 1944718), (22, 972359), (43, 497486), (86, 248743), (473, 45226), (946, 22613)]