205465720

素因数分解:

$2^3\times 5^1\times {\mathrm{313}}^1\times {\mathrm{16411}}^1$

素因数の和:16735

約数の個数: 32

約数和(自身を含む): 463803120

約数和(自身を除く): 258337400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 313, 626, 1252, 1565, 2504, 3130, 6260, 12520, 16411, 32822, 65644, 82055, 131288, 164110, 328220, 656440, 5136643, 10273286, 20546572, 25683215, 41093144, 51366430, 102732860, 205465720]

約数ペア:

[(1, 205465720), (2, 102732860), (4, 51366430), (5, 41093144), (8, 25683215), (10, 20546572), (20, 10273286), (40, 5136643), (313, 656440), (626, 328220), (1252, 164110), (1565, 131288), (2504, 82055), (3130, 65644), (6260, 32822), (12520, 16411)]