20885205

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{311}}^1$

素因数の和:378

約数の個数: 48

約数和(自身を含む): 37844352

約数和(自身を除く): 16959147

約数列:

[1, 3, 5, 11, 15, 33, 37, 55, 111, 121, 165, 185, 311, 363, 407, 555, 605, 933, 1221, 1555, 1815, 2035, 3421, 4477, 4665, 6105, 10263, 11507, 13431, 17105, 22385, 34521, 37631, 51315, 57535, 67155, 112893, 126577, 172605, 188155, 379731, 564465, 632885, 1392347, 1898655, 4177041, 6961735, 20885205]

約数ペア:

[(1, 20885205), (3, 6961735), (5, 4177041), (11, 1898655), (15, 1392347), (33, 632885), (37, 564465), (55, 379731), (111, 188155), (121, 172605), (165, 126577), (185, 112893), (311, 67155), (363, 57535), (407, 51315), (555, 37631), (605, 34521), (933, 22385), (1221, 17105), (1555, 13431), (1815, 11507), (2035, 10263), (3421, 6105), (4477, 4665)]