81285560

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{43237}}^1$

素因数の和:43295

約数の個数: 32

約数和(自身を含む): 186788160

約数和(自身を除く): 105502600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 376, 470, 940, 1880, 43237, 86474, 172948, 216185, 345896, 432370, 864740, 1729480, 2032139, 4064278, 8128556, 10160695, 16257112, 20321390, 40642780, 81285560]

約数ペア:

[(1, 81285560), (2, 40642780), (4, 20321390), (5, 16257112), (8, 10160695), (10, 8128556), (20, 4064278), (40, 2032139), (47, 1729480), (94, 864740), (188, 432370), (235, 345896), (376, 216185), (470, 172948), (940, 86474), (1880, 43237)]