20290851

素因数分解:

$3^3\times 7^4\times {\mathrm{313}}^1$

素因数の和:350

約数の個数: 40

約数和(自身を含む): 35180560

約数和(自身を除く): 14889709

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 313, 343, 441, 939, 1029, 1323, 2191, 2401, 2817, 3087, 6573, 7203, 8451, 9261, 15337, 19719, 21609, 46011, 59157, 64827, 107359, 138033, 322077, 414099, 751513, 966231, 2254539, 2898693, 6763617, 20290851]

約数ペア:

[(1, 20290851), (3, 6763617), (7, 2898693), (9, 2254539), (21, 966231), (27, 751513), (49, 414099), (63, 322077), (147, 138033), (189, 107359), (313, 64827), (343, 59157), (441, 46011), (939, 21609), (1029, 19719), (1323, 15337), (2191, 9261), (2401, 8451), (2817, 7203), (3087, 6573)]