21289191

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{4007}}^1$

素因数の和:4051

約数の個数: 32

約数和(自身を含む): 36937728

約数和(自身を除く): 15648537

約数列:

[1, 3, 7, 11, 21, 23, 33, 69, 77, 161, 231, 253, 483, 759, 1771, 4007, 5313, 12021, 28049, 44077, 84147, 92161, 132231, 276483, 308539, 645127, 925617, 1013771, 1935381, 3041313, 7096397, 21289191]

約数ペア:

[(1, 21289191), (3, 7096397), (7, 3041313), (11, 1935381), (21, 1013771), (23, 925617), (33, 645127), (69, 308539), (77, 276483), (161, 132231), (231, 92161), (253, 84147), (483, 44077), (759, 28049), (1771, 12021), (4007, 5313)]