20684559

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{1103}}^1$

素因数の和:1179

約数の個数: 32

約数和(自身を含む): 33914880

約数和(自身を除く): 13230321

約数列:

[1, 3, 7, 19, 21, 47, 57, 133, 141, 329, 399, 893, 987, 1103, 2679, 3309, 6251, 7721, 18753, 20957, 23163, 51841, 62871, 146699, 155523, 362887, 440097, 984979, 1088661, 2954937, 6894853, 20684559]

約数ペア:

[(1, 20684559), (3, 6894853), (7, 2954937), (19, 1088661), (21, 984979), (47, 440097), (57, 362887), (133, 155523), (141, 146699), (329, 62871), (399, 51841), (893, 23163), (987, 20957), (1103, 18753), (2679, 7721), (3309, 6251)]