21280539

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{337}}^1$

素因数の和:475

約数の個数: 32

約数和(自身を含む): 33918976

約数和(自身を除く): 12638437

約数列:

[1, 3, 7, 21, 31, 93, 97, 217, 291, 337, 651, 679, 1011, 2037, 2359, 3007, 7077, 9021, 10447, 21049, 31341, 32689, 63147, 73129, 98067, 219387, 228823, 686469, 1013359, 3040077, 7093513, 21280539]

約数ペア:

[(1, 21280539), (3, 7093513), (7, 3040077), (21, 1013359), (31, 686469), (93, 228823), (97, 219387), (217, 98067), (291, 73129), (337, 63147), (651, 32689), (679, 31341), (1011, 21049), (2037, 10447), (2359, 9021), (3007, 7077)]