21020307

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{90997}}^1$

素因数の和:91018

約数の個数: 16

約数和(自身を含む): 34943232

約数和(自身を除く): 13922925

約数列:

[1, 3, 7, 11, 21, 33, 77, 231, 90997, 272991, 636979, 1000967, 1910937, 3002901, 7006769, 21020307]

約数ペア:

[(1, 21020307), (3, 7006769), (7, 3002901), (11, 1910937), (21, 1000967), (33, 636979), (77, 272991), (231, 90997)]