20991902

素因数分解:

$2^1\times {\mathrm{107}}^1\times {\mathrm{233}}^1\times {\mathrm{421}}^1$

素因数の和:763

約数の個数: 16

約数和(自身を含む): 31994352

約数和(自身を除く): 11002450

約数列:

[1, 2, 107, 214, 233, 421, 466, 842, 24931, 45047, 49862, 90094, 98093, 196186, 10495951, 20991902]

約数ペア:

[(1, 20991902), (2, 10495951), (107, 196186), (214, 98093), (233, 90094), (421, 49862), (466, 45047), (842, 24931)]