20491484

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{313}}^1\times {\mathrm{1259}}^1$

素因数の和:1589

約数の個数: 24

約数和(自身を含む): 38772720

約数和(自身を除く): 18281236

約数列:

[1, 2, 4, 13, 26, 52, 313, 626, 1252, 1259, 2518, 4069, 5036, 8138, 16276, 16367, 32734, 65468, 394067, 788134, 1576268, 5122871, 10245742, 20491484]

約数ペア:

[(1, 20491484), (2, 10245742), (4, 5122871), (13, 1576268), (26, 788134), (52, 394067), (313, 65468), (626, 32734), (1252, 16367), (1259, 16276), (2518, 8138), (4069, 5036)]