20809978

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{78233}}^1$

素因数の和:78261

約数の個数: 16

約数和(自身を含む): 37552320

約数和(自身を除く): 16742342

約数列:

[1, 2, 7, 14, 19, 38, 133, 266, 78233, 156466, 547631, 1095262, 1486427, 2972854, 10404989, 20809978]

約数ペア:

[(1, 20809978), (2, 10404989), (7, 2972854), (14, 1486427), (19, 1095262), (38, 547631), (133, 156466), (266, 78233)]