20926719

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{197}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 35212320

約数和(自身を除く): 14285601

約数列:

[1, 3, 9, 11, 29, 33, 37, 87, 99, 111, 197, 261, 319, 333, 407, 591, 957, 1073, 1221, 1773, 2167, 2871, 3219, 3663, 5713, 6501, 7289, 9657, 11803, 17139, 19503, 21867, 35409, 51417, 62843, 65601, 80179, 106227, 188529, 211381, 240537, 565587, 634143, 721611, 1902429, 2325191, 6975573, 20926719]

約数ペア:

[(1, 20926719), (3, 6975573), (9, 2325191), (11, 1902429), (29, 721611), (33, 634143), (37, 565587), (87, 240537), (99, 211381), (111, 188529), (197, 106227), (261, 80179), (319, 65601), (333, 62843), (407, 51417), (591, 35409), (957, 21867), (1073, 19503), (1221, 17139), (1773, 11803), (2167, 9657), (2871, 7289), (3219, 6501), (3663, 5713)]