21008757

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{90947}}^1$

素因数の和:90968

約数の個数: 16

約数和(自身を含む): 34924032

約数和(自身を除く): 13915275

約数列:

[1, 3, 7, 11, 21, 33, 77, 231, 90947, 272841, 636629, 1000417, 1909887, 3001251, 7002919, 21008757]

約数ペア:

[(1, 21008757), (3, 7002919), (7, 3001251), (11, 1909887), (21, 1000417), (33, 636629), (77, 272841), (231, 90947)]