19981485

素因数分解:

$3^4\times 5^1\times {\mathrm{103}}^1\times {\mathrm{479}}^1$

素因数の和:599

約数の個数: 40

約数和(自身を含む): 36241920

約数和(自身を除く): 16260435

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 103, 135, 309, 405, 479, 515, 927, 1437, 1545, 2395, 2781, 4311, 4635, 7185, 8343, 12933, 13905, 21555, 38799, 41715, 49337, 64665, 148011, 193995, 246685, 444033, 740055, 1332099, 2220165, 3996297, 6660495, 19981485]

約数ペア:

[(1, 19981485), (3, 6660495), (5, 3996297), (9, 2220165), (15, 1332099), (27, 740055), (45, 444033), (81, 246685), (103, 193995), (135, 148011), (309, 64665), (405, 49337), (479, 41715), (515, 38799), (927, 21555), (1437, 13905), (1545, 12933), (2395, 8343), (2781, 7185), (4311, 4635)]