21077821

素因数分解:

${\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{139}}^1\times {\mathrm{347}}^1$

素因数の和:528

約数の個数: 16

約数和(自身を含む): 23385600

約数和(自身を除く): 2307779

約数列:

[1, 19, 23, 139, 347, 437, 2641, 3197, 6593, 7981, 48233, 60743, 151639, 916427, 1109359, 21077821]

約数ペア:

[(1, 21077821), (19, 1109359), (23, 916427), (139, 151639), (347, 60743), (437, 48233), (2641, 7981), (3197, 6593)]