21645640

素因数分解:

$2^3\times 5^1\times {\mathrm{541141}}^1$

素因数の和:541152

約数の個数: 16

約数和(自身を含む): 48702780

約数和(自身を除く): 27057140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 541141, 1082282, 2164564, 2705705, 4329128, 5411410, 10822820, 21645640]

約数ペア:

[(1, 21645640), (2, 10822820), (4, 5411410), (5, 4329128), (8, 2705705), (10, 2164564), (20, 1082282), (40, 541141)]