207800020

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{131519}}^1$

素因数の和:131607

約数の個数: 24

約数和(自身を含む): 441907200

約数和(自身を除く): 234107180

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 131519, 263038, 526076, 657595, 1315190, 2630380, 10390001, 20780002, 41560004, 51950005, 103900010, 207800020]

約数ペア:

[(1, 207800020), (2, 103900010), (4, 51950005), (5, 41560004), (10, 20780002), (20, 10390001), (79, 2630380), (158, 1315190), (316, 657595), (395, 526076), (790, 263038), (1580, 131519)]