19959955

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^2\times {\mathrm{127}}^1$

素因数の和:235

約数の個数: 24

約数和(自身を含む): 26168832

約数和(自身を除く): 6208877

約数列:

[1, 5, 17, 43, 85, 127, 215, 635, 731, 1849, 2159, 3655, 5461, 9245, 10795, 27305, 31433, 92837, 157165, 234823, 464185, 1174115, 3991991, 19959955]

約数ペア:

[(1, 19959955), (5, 3991991), (17, 1174115), (43, 464185), (85, 234823), (127, 157165), (215, 92837), (635, 31433), (731, 27305), (1849, 10795), (2159, 9245), (3655, 5461)]