21393405

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{3929}}^1$

素因数の和:3962

約数の個数: 36

約数和(自身を含む): 40769820

約数和(自身を除く): 19376415

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 121, 165, 363, 495, 605, 1089, 1815, 3929, 5445, 11787, 19645, 35361, 43219, 58935, 129657, 176805, 216095, 388971, 475409, 648285, 1426227, 1944855, 2377045, 4278681, 7131135, 21393405]

約数ペア:

[(1, 21393405), (3, 7131135), (5, 4278681), (9, 2377045), (11, 1944855), (15, 1426227), (33, 648285), (45, 475409), (55, 388971), (99, 216095), (121, 176805), (165, 129657), (363, 58935), (495, 43219), (605, 35361), (1089, 19645), (1815, 11787), (3929, 5445)]