20800516

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{179}}^1$

素因数の和:352

約数の個数: 48

約数和(自身を含む): 42336000

約数和(自身を除く): 21535484

約数列:

[1, 2, 4, 11, 19, 22, 38, 44, 76, 139, 179, 209, 278, 358, 418, 556, 716, 836, 1529, 1969, 2641, 3058, 3401, 3938, 5282, 6116, 6802, 7876, 10564, 13604, 24881, 29051, 37411, 49762, 58102, 74822, 99524, 116204, 149644, 273691, 472739, 547382, 945478, 1094764, 1890956, 5200129, 10400258, 20800516]

約数ペア:

[(1, 20800516), (2, 10400258), (4, 5200129), (11, 1890956), (19, 1094764), (22, 945478), (38, 547382), (44, 472739), (76, 273691), (139, 149644), (179, 116204), (209, 99524), (278, 74822), (358, 58102), (418, 49762), (556, 37411), (716, 29051), (836, 24881), (1529, 13604), (1969, 10564), (2641, 7876), (3058, 6802), (3401, 6116), (3938, 5282)]