19987665

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{761}}^1$

素因数の和:889

約数の個数: 32

約数和(自身を含む): 34235136

約数和(自身を除く): 14247471

約数列:

[1, 3, 5, 15, 17, 51, 85, 103, 255, 309, 515, 761, 1545, 1751, 2283, 3805, 5253, 8755, 11415, 12937, 26265, 38811, 64685, 78383, 194055, 235149, 391915, 1175745, 1332511, 3997533, 6662555, 19987665]

約数ペア:

[(1, 19987665), (3, 6662555), (5, 3997533), (15, 1332511), (17, 1175745), (51, 391915), (85, 235149), (103, 194055), (255, 78383), (309, 64685), (515, 38811), (761, 26265), (1545, 12937), (1751, 11415), (2283, 8755), (3805, 5253)]