21138828

素因数分解:

$2^2\times 3^1\times {\mathrm{317}}^1\times {\mathrm{5557}}^1$

素因数の和:5881

約数の個数: 24

約数和(自身を含む): 49488432

約数和(自身を除く): 28349604

約数列:

[1, 2, 3, 4, 6, 12, 317, 634, 951, 1268, 1902, 3804, 5557, 11114, 16671, 22228, 33342, 66684, 1761569, 3523138, 5284707, 7046276, 10569414, 21138828]

約数ペア:

[(1, 21138828), (2, 10569414), (3, 7046276), (4, 5284707), (6, 3523138), (12, 1761569), (317, 66684), (634, 33342), (951, 22228), (1268, 16671), (1902, 11114), (3804, 5557)]