21198705

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{128477}}^1$

素因数の和:128496

約数の個数: 16

約数和(自身を含む): 37001664

約数和(自身を除く): 15802959

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 128477, 385431, 642385, 1413247, 1927155, 4239741, 7066235, 21198705]

約数ペア:

[(1, 21198705), (3, 7066235), (5, 4239741), (11, 1927155), (15, 1413247), (33, 642385), (55, 385431), (165, 128477)]