21043719

素因数分解:

$3^4\times {\mathrm{61}}^1\times {\mathrm{4259}}^1$

素因数の和:4332

約数の個数: 20

約数和(自身を含む): 31958520

約数和(自身を除く): 10914801

約数列:

[1, 3, 9, 27, 61, 81, 183, 549, 1647, 4259, 4941, 12777, 38331, 114993, 259799, 344979, 779397, 2338191, 7014573, 21043719]

約数ペア:

[(1, 21043719), (3, 7014573), (9, 2338191), (27, 779397), (61, 344979), (81, 259799), (183, 114993), (549, 38331), (1647, 12777), (4259, 4941)]