19999905

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{733}}^1$

素因数の和:865

約数の個数: 32

約数和(自身を含む): 34245504

約数和(自身を除く): 14245599

約数列:

[1, 3, 5, 15, 17, 51, 85, 107, 255, 321, 535, 733, 1605, 1819, 2199, 3665, 5457, 9095, 10995, 12461, 27285, 37383, 62305, 78431, 186915, 235293, 392155, 1176465, 1333327, 3999981, 6666635, 19999905]

約数ペア:

[(1, 19999905), (3, 6666635), (5, 3999981), (15, 1333327), (17, 1176465), (51, 392155), (85, 235293), (107, 186915), (255, 78431), (321, 62305), (535, 37383), (733, 27285), (1605, 12461), (1819, 10995), (2199, 9095), (3665, 5457)]