21488409

素因数分解:

$3^4\times {\mathrm{61}}^1\times {\mathrm{4349}}^1$

素因数の和:4422

約数の個数: 20

約数和(自身を含む): 32633700

約数和(自身を除く): 11145291

約数列:

[1, 3, 9, 27, 61, 81, 183, 549, 1647, 4349, 4941, 13047, 39141, 117423, 265289, 352269, 795867, 2387601, 7162803, 21488409]

約数ペア:

[(1, 21488409), (3, 7162803), (9, 2387601), (27, 795867), (61, 352269), (81, 265289), (183, 117423), (549, 39141), (1647, 13047), (4349, 4941)]