81639.0000000

素因数分解:

$3^5\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1$

素因数の和:72

約数の個数: 48

約数和(自身を含む): 1863680

約数和(自身を除く): 861791

約数列:

[1, 3, 7, 9, 19, 21, 27, 31, 57, 63, 81, 93, 133, 171, 189, 217, 243, 279, 399, 513, 567, 589, 651, 837, 1197, 1539, 1701, 1767, 1953, 2511, 3591, 4123, 4617, 5301, 5859, 7533, 10773, 12369, 15903, 17577, 32319, 37107, 47709, 52731, 111321, 143127, 333963, 1001889]

約数ペア:

[(1, 1001889), (3, 333963), (7, 143127), (9, 111321), (19, 52731), (21, 47709), (27, 37107), (31, 32319), (57, 17577), (63, 15903), (81, 12369), (93, 10773), (133, 7533), (171, 5859), (189, 5301), (217, 4617), (243, 4123), (279, 3591), (399, 2511), (513, 1953), (567, 1767), (589, 1701), (651, 1539), (837, 1197)]