28259260

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{21089}}^1$

素因数の和:21165

約数の個数: 24

約数和(自身を含む): 60233040

約数和(自身を除く): 31973780

約数列:

[1, 2, 4, 5, 10, 20, 67, 134, 268, 335, 670, 1340, 21089, 42178, 84356, 105445, 210890, 421780, 1412963, 2825926, 5651852, 7064815, 14129630, 28259260]

約数ペア:

[(1, 28259260), (2, 14129630), (4, 7064815), (5, 5651852), (10, 2825926), (20, 1412963), (67, 421780), (134, 210890), (268, 105445), (335, 84356), (670, 42178), (1340, 21089)]