20819745

素因数分解:

$3^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{3643}}^1$

素因数の和:3781

約数の個数: 24

約数和(自身を含む): 36381696

約数和(自身を除く): 15561951

約数列:

[1, 3, 5, 9, 15, 45, 127, 381, 635, 1143, 1905, 3643, 5715, 10929, 18215, 32787, 54645, 163935, 462661, 1387983, 2313305, 4163949, 6939915, 20819745]

約数ペア:

[(1, 20819745), (3, 6939915), (5, 4163949), (9, 2313305), (15, 1387983), (45, 462661), (127, 163935), (381, 54645), (635, 32787), (1143, 18215), (1905, 10929), (3643, 5715)]