20405241

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{2113}}^1$

素因数の和:2185

約数の個数: 24

約数和(自身を含む): 31329480

約数和(自身を除く): 10924239

約数列:

[1, 3, 9, 29, 37, 87, 111, 261, 333, 1073, 2113, 3219, 6339, 9657, 19017, 61277, 78181, 183831, 234543, 551493, 703629, 2267249, 6801747, 20405241]

約数ペア:

[(1, 20405241), (3, 6801747), (9, 2267249), (29, 703629), (37, 551493), (87, 234543), (111, 183831), (261, 78181), (333, 61277), (1073, 19017), (2113, 9657), (3219, 6339)]