81012.0000000

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{21139}}^1$

素因数の和:21165

約数の個数: 24

約数和(自身を含む): 15981840

約数和(自身を除く): 8794580

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 21139, 42278, 84556, 105695, 211390, 359363, 422780, 718726, 1437452, 1796815, 3593630, 7187260]

約数ペア:

[(1, 7187260), (2, 3593630), (4, 1796815), (5, 1437452), (10, 718726), (17, 422780), (20, 359363), (34, 211390), (68, 105695), (85, 84556), (170, 42278), (340, 21139)]