19711989

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{787}}^1$

素因数の和:838

約数の個数: 36

約数和(自身を含む): 32698848

約数和(自身を除く): 12986859

約数列:

[1, 3, 9, 11, 23, 33, 69, 99, 121, 207, 253, 363, 759, 787, 1089, 2277, 2361, 2783, 7083, 8349, 8657, 18101, 25047, 25971, 54303, 77913, 95227, 162909, 199111, 285681, 597333, 857043, 1791999, 2190221, 6570663, 19711989]

約数ペア:

[(1, 19711989), (3, 6570663), (9, 2190221), (11, 1791999), (23, 857043), (33, 597333), (69, 285681), (99, 199111), (121, 162909), (207, 95227), (253, 77913), (363, 54303), (759, 25971), (787, 25047), (1089, 18101), (2277, 8657), (2361, 8349), (2783, 7083)]