18813685

素因数分解:

$5^1\times {\mathrm{11}}^4\times {\mathrm{257}}^1$

素因数の和:306

約数の個数: 20

約数和(自身を含む): 24930540

約数和(自身を除く): 6116855

約数列:

[1, 5, 11, 55, 121, 257, 605, 1285, 1331, 2827, 6655, 14135, 14641, 31097, 73205, 155485, 342067, 1710335, 3762737, 18813685]

約数ペア:

[(1, 18813685), (5, 3762737), (11, 1710335), (55, 342067), (121, 155485), (257, 73205), (605, 31097), (1285, 14641), (1331, 14135), (2827, 6655)]