21564711

素因数分解:

$3^4\times 7^1\times {\mathrm{73}}^1\times {\mathrm{521}}^1$

素因数の和:613

約数の個数: 40

約数和(自身を含む): 37391904

約数和(自身を除く): 15827193

約数列:

[1, 3, 7, 9, 21, 27, 63, 73, 81, 189, 219, 511, 521, 567, 657, 1533, 1563, 1971, 3647, 4599, 4689, 5913, 10941, 13797, 14067, 32823, 38033, 41391, 42201, 98469, 114099, 266231, 295407, 342297, 798693, 1026891, 2396079, 3080673, 7188237, 21564711]

約数ペア:

[(1, 21564711), (3, 7188237), (7, 3080673), (9, 2396079), (21, 1026891), (27, 798693), (63, 342297), (73, 295407), (81, 266231), (189, 114099), (219, 98469), (511, 42201), (521, 41391), (567, 38033), (657, 32823), (1533, 14067), (1563, 13797), (1971, 10941), (3647, 5913), (4599, 4689)]