19987209

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{173}}^1\times {\mathrm{389}}^1$

素因数の和:582

約数の個数: 32

約数和(自身を含む): 32572800

約数和(自身を除く): 12585591

約数列:

[1, 3, 9, 11, 27, 33, 99, 173, 297, 389, 519, 1167, 1557, 1903, 3501, 4279, 4671, 5709, 10503, 12837, 17127, 38511, 51381, 67297, 115533, 201891, 605673, 740267, 1817019, 2220801, 6662403, 19987209]

約数ペア:

[(1, 19987209), (3, 6662403), (9, 2220801), (11, 1817019), (27, 740267), (33, 605673), (99, 201891), (173, 115533), (297, 67297), (389, 51381), (519, 38511), (1167, 17127), (1557, 12837), (1903, 10503), (3501, 5709), (4279, 4671)]