20537780

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9421}}^1$

素因数の和:9539

約数の個数: 24

約数和(自身を含む): 43529640

約数和(自身を除く): 22991860

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9421, 18842, 37684, 47105, 94210, 188420, 1026889, 2053778, 4107556, 5134445, 10268890, 20537780]

約数ペア:

[(1, 20537780), (2, 10268890), (4, 5134445), (5, 4107556), (10, 2053778), (20, 1026889), (109, 188420), (218, 94210), (436, 47105), (545, 37684), (1090, 18842), (2180, 9421)]