20765565

素因数分解:

$3^9\times 5^1\times {\mathrm{211}}^1$

素因数の和:243

約数の個数: 40

約数和(自身を含む): 37554528

約数和(自身を除く): 16788963

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 211, 243, 405, 633, 729, 1055, 1215, 1899, 2187, 3165, 3645, 5697, 6561, 9495, 10935, 17091, 19683, 28485, 32805, 51273, 85455, 98415, 153819, 256365, 461457, 769095, 1384371, 2307285, 4153113, 6921855, 20765565]

約数ペア:

[(1, 20765565), (3, 6921855), (5, 4153113), (9, 2307285), (15, 1384371), (27, 769095), (45, 461457), (81, 256365), (135, 153819), (211, 98415), (243, 85455), (405, 51273), (633, 32805), (729, 28485), (1055, 19683), (1215, 17091), (1899, 10935), (2187, 9495), (3165, 6561), (3645, 5697)]