21083559

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{997}}^1$

素因数の和:1079

約数の個数: 32

約数和(自身を含む): 34490880

約数和(自身を除く): 13407321

約数列:

[1, 3, 7, 19, 21, 53, 57, 133, 159, 371, 399, 997, 1007, 1113, 2991, 3021, 6979, 7049, 18943, 20937, 21147, 52841, 56829, 132601, 158523, 369887, 397803, 1003979, 1109661, 3011937, 7027853, 21083559]

約数ペア:

[(1, 21083559), (3, 7027853), (7, 3011937), (19, 1109661), (21, 1003979), (53, 397803), (57, 369887), (133, 158523), (159, 132601), (371, 56829), (399, 52841), (997, 21147), (1007, 20937), (1113, 18943), (2991, 7049), (3021, 6979)]