19906821

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{233}}^1\times {\mathrm{863}}^1$

素因数の和:1113

約数の個数: 24

約数和(自身を含む): 31539456

約数和(自身を除く): 11632635

約数列:

[1, 3, 9, 11, 33, 99, 233, 699, 863, 2097, 2563, 2589, 7689, 7767, 9493, 23067, 28479, 85437, 201079, 603237, 1809711, 2211869, 6635607, 19906821]

約数ペア:

[(1, 19906821), (3, 6635607), (9, 2211869), (11, 1809711), (33, 603237), (99, 201079), (233, 85437), (699, 28479), (863, 23067), (2097, 9493), (2563, 7767), (2589, 7689)]