21798740

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{4241}}^1$

素因数の和:4507

約数の個数: 24

約数和(自身を含む): 45966312

約数和(自身を除く): 24167572

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 2570, 4241, 5140, 8482, 16964, 21205, 42410, 84820, 1089937, 2179874, 4359748, 5449685, 10899370, 21798740]

約数ペア:

[(1, 21798740), (2, 10899370), (4, 5449685), (5, 4359748), (10, 2179874), (20, 1089937), (257, 84820), (514, 42410), (1028, 21205), (1285, 16964), (2570, 8482), (4241, 5140)]