19997355

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{659}}^1$

素因数の和:708

約数の個数: 48

約数和(自身を含む): 38903040

約数和(自身を除く): 18905685

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 289, 357, 595, 659, 867, 1445, 1785, 1977, 2023, 3295, 4335, 4613, 6069, 9885, 10115, 11203, 13839, 23065, 30345, 33609, 56015, 69195, 78421, 168045, 190451, 235263, 392105, 571353, 952255, 1176315, 1333157, 2856765, 3999471, 6665785, 19997355]

約数ペア:

[(1, 19997355), (3, 6665785), (5, 3999471), (7, 2856765), (15, 1333157), (17, 1176315), (21, 952255), (35, 571353), (51, 392105), (85, 235263), (105, 190451), (119, 168045), (255, 78421), (289, 69195), (357, 56015), (595, 33609), (659, 30345), (867, 23065), (1445, 13839), (1785, 11203), (1977, 10115), (2023, 9885), (3295, 6069), (4335, 4613)]