21139286

素因数分解:

$2^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{11353}}^1$

素因数の和:11388

約数の個数: 24

約数和(自身を含む): 38830680

約数和(自身を除く): 17691394

約数列:

[1, 2, 7, 14, 19, 38, 49, 98, 133, 266, 931, 1862, 11353, 22706, 79471, 158942, 215707, 431414, 556297, 1112594, 1509949, 3019898, 10569643, 21139286]

約数ペア:

[(1, 21139286), (2, 10569643), (7, 3019898), (14, 1509949), (19, 1112594), (38, 556297), (49, 431414), (98, 215707), (133, 158942), (266, 79471), (931, 22706), (1862, 11353)]