20621788

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{137}}^1\times {\mathrm{311}}^1$

素因数の和:474

約数の個数: 36

約数和(自身を含む): 40085136

約数和(自身を除く): 19463348

約数列:

[1, 2, 4, 11, 22, 44, 121, 137, 242, 274, 311, 484, 548, 622, 1244, 1507, 3014, 3421, 6028, 6842, 13684, 16577, 33154, 37631, 42607, 66308, 75262, 85214, 150524, 170428, 468677, 937354, 1874708, 5155447, 10310894, 20621788]

約数ペア:

[(1, 20621788), (2, 10310894), (4, 5155447), (11, 1874708), (22, 937354), (44, 468677), (121, 170428), (137, 150524), (242, 85214), (274, 75262), (311, 66308), (484, 42607), (548, 37631), (622, 33154), (1244, 16577), (1507, 13684), (3014, 6842), (3421, 6028)]