20213765

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1663}}^1$

素因数の和:1709

約数の個数: 32

約数和(自身を含む): 30191616

約数和(自身を除く): 9977851

約数列:

[1, 5, 11, 13, 17, 55, 65, 85, 143, 187, 221, 715, 935, 1105, 1663, 2431, 8315, 12155, 18293, 21619, 28271, 91465, 108095, 141355, 237809, 310981, 367523, 1189045, 1554905, 1837615, 4042753, 20213765]

約数ペア:

[(1, 20213765), (5, 4042753), (11, 1837615), (13, 1554905), (17, 1189045), (55, 367523), (65, 310981), (85, 237809), (143, 141355), (187, 108095), (221, 91465), (715, 28271), (935, 21619), (1105, 18293), (1663, 12155), (2431, 8315)]