201990910

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{18181}}^1$

素因数の和:18300

約数の個数: 32

約数和(自身を含む): 400585824

約数和(自身を除く): 198594914

約数列:

[1, 2, 5, 10, 11, 22, 55, 101, 110, 202, 505, 1010, 1111, 2222, 5555, 11110, 18181, 36362, 90905, 181810, 199991, 399982, 999955, 1836281, 1999910, 3672562, 9181405, 18362810, 20199091, 40398182, 100995455, 201990910]

約数ペア:

[(1, 201990910), (2, 100995455), (5, 40398182), (10, 20199091), (11, 18362810), (22, 9181405), (55, 3672562), (101, 1999910), (110, 1836281), (202, 999955), (505, 399982), (1010, 199991), (1111, 181810), (2222, 90905), (5555, 36362), (11110, 18181)]