18904105

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1$

素因数の和:237

約数の個数: 32

約数和(自身を含む): 25878528

約数和(自身を除く): 6974423

約数列:

[1, 5, 11, 47, 55, 71, 103, 235, 355, 515, 517, 781, 1133, 2585, 3337, 3905, 4841, 5665, 7313, 16685, 24205, 36565, 36707, 53251, 80443, 183535, 266255, 343711, 402215, 1718555, 3780821, 18904105]

約数ペア:

[(1, 18904105), (5, 3780821), (11, 1718555), (47, 402215), (55, 343711), (71, 266255), (103, 183535), (235, 80443), (355, 53251), (515, 36707), (517, 36565), (781, 24205), (1133, 16685), (2585, 7313), (3337, 5665), (3905, 4841)]