21097307

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{311}}^1\times {\mathrm{881}}^1$

素因数の和:1210

約数の個数: 16

約数和(自身を含む): 26417664

約数和(自身を除く): 5320357

約数列:

[1, 7, 11, 77, 311, 881, 2177, 3421, 6167, 9691, 23947, 67837, 273991, 1917937, 3013901, 21097307]

約数ペア:

[(1, 21097307), (7, 3013901), (11, 1917937), (77, 273991), (311, 67837), (881, 23947), (2177, 9691), (3421, 6167)]