21018778

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{4801}}^1$

素因数の和:5013

約数の個数: 16

約数和(自身を含む): 34574400

約数和(自身を除く): 13555622

約数列:

[1, 2, 11, 22, 199, 398, 2189, 4378, 4801, 9602, 52811, 105622, 955399, 1910798, 10509389, 21018778]

約数ペア:

[(1, 21018778), (2, 10509389), (11, 1910798), (22, 955399), (199, 105622), (398, 52811), (2189, 9602), (4378, 4801)]