21306890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17609}}^1$

素因数の和:17638

約数の個数: 24

約数和(自身を含む): 42158340

約数和(自身を除く): 20851450

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 121, 242, 605, 1210, 17609, 35218, 88045, 176090, 193699, 387398, 968495, 1936990, 2130689, 4261378, 10653445, 21306890]

約数ペア:

[(1, 21306890), (2, 10653445), (5, 4261378), (10, 2130689), (11, 1936990), (22, 968495), (55, 387398), (110, 193699), (121, 176090), (242, 88045), (605, 35218), (1210, 17609)]