20957805

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{1283}}^1$

素因数の和:1319

約数の個数: 48

約数和(自身を含む): 40985280

約数和(自身を除く): 20027475

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 99, 121, 135, 165, 297, 363, 495, 605, 1089, 1283, 1485, 1815, 3267, 3849, 5445, 6415, 11547, 14113, 16335, 19245, 34641, 42339, 57735, 70565, 127017, 155243, 173205, 211695, 381051, 465729, 635085, 776215, 1397187, 1905255, 2328645, 4191561, 6985935, 20957805]

約数ペア:

[(1, 20957805), (3, 6985935), (5, 4191561), (9, 2328645), (11, 1905255), (15, 1397187), (27, 776215), (33, 635085), (45, 465729), (55, 381051), (99, 211695), (121, 173205), (135, 155243), (165, 127017), (297, 70565), (363, 57735), (495, 42339), (605, 34641), (1089, 19245), (1283, 16335), (1485, 14113), (1815, 11547), (3267, 6415), (3849, 5445)]