21989737

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{347}}^1\times {\mathrm{823}}^1$

素因数の和:1188

約数の個数: 16

約数和(自身を含む): 27528192

約数和(自身を除く): 5538455

約数列:

[1, 7, 11, 77, 347, 823, 2429, 3817, 5761, 9053, 26719, 63371, 285581, 1999067, 3141391, 21989737]

約数ペア:

[(1, 21989737), (7, 3141391), (11, 1999067), (77, 285581), (347, 63371), (823, 26719), (2429, 9053), (3817, 5761)]