21507794

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{139661}}^1$

素因数の和:139681

約数の個数: 16

約数和(自身を含む): 40222656

約数和(自身を除く): 18714862

約数列:

[1, 2, 7, 11, 14, 22, 77, 154, 139661, 279322, 977627, 1536271, 1955254, 3072542, 10753897, 21507794]

約数ペア:

[(1, 21507794), (2, 10753897), (7, 3072542), (11, 1955254), (14, 1536271), (22, 977627), (77, 279322), (154, 139661)]