19988752

素因数分解:

$2^4\times 7^1\times {\mathrm{317}}^1\times {\mathrm{563}}^1$

素因数の和:895

約数の個数: 40

約数和(自身を含む): 44479296

約数和(自身を除く): 24490544

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 317, 563, 634, 1126, 1268, 2219, 2252, 2536, 3941, 4438, 4504, 5072, 7882, 8876, 9008, 15764, 17752, 31528, 35504, 63056, 178471, 356942, 713884, 1249297, 1427768, 2498594, 2855536, 4997188, 9994376, 19988752]

約数ペア:

[(1, 19988752), (2, 9994376), (4, 4997188), (7, 2855536), (8, 2498594), (14, 1427768), (16, 1249297), (28, 713884), (56, 356942), (112, 178471), (317, 63056), (563, 35504), (634, 31528), (1126, 17752), (1268, 15764), (2219, 9008), (2252, 8876), (2536, 7882), (3941, 5072), (4438, 4504)]