209065520

素因数分解:

$2^4\times 5^1\times {\mathrm{131}}^1\times {\mathrm{19949}}^1$

素因数の和:20093

約数の個数: 40

約数和(自身を含む): 489812400

約数和(自身を除く): 280746880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 131, 262, 524, 655, 1048, 1310, 2096, 2620, 5240, 10480, 19949, 39898, 79796, 99745, 159592, 199490, 319184, 398980, 797960, 1595920, 2613319, 5226638, 10453276, 13066595, 20906552, 26133190, 41813104, 52266380, 104532760, 209065520]

約数ペア:

[(1, 209065520), (2, 104532760), (4, 52266380), (5, 41813104), (8, 26133190), (10, 20906552), (16, 13066595), (20, 10453276), (40, 5226638), (80, 2613319), (131, 1595920), (262, 797960), (524, 398980), (655, 319184), (1048, 199490), (1310, 159592), (2096, 99745), (2620, 79796), (5240, 39898), (10480, 19949)]