19984558

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{409}}^1\times {\mathrm{2221}}^1$

素因数の和:2643

約数の個数: 16

約数和(自身を含む): 32796720

約数和(自身を除く): 12812162

約数列:

[1, 2, 11, 22, 409, 818, 2221, 4442, 4499, 8998, 24431, 48862, 908389, 1816778, 9992279, 19984558]

約数ペア:

[(1, 19984558), (2, 9992279), (11, 1816778), (22, 908389), (409, 48862), (818, 24431), (2221, 8998), (4442, 4499)]