21705859

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{4349}}^1$

素因数の和:4410

約数の個数: 16

約数和(自身を含む): 26726400

約数和(自身を除く): 5020541

約数列:

[1, 7, 23, 31, 161, 217, 713, 4349, 4991, 30443, 100027, 134819, 700189, 943733, 3100837, 21705859]

約数ペア:

[(1, 21705859), (7, 3100837), (23, 943733), (31, 700189), (161, 134819), (217, 100027), (713, 30443), (4349, 4991)]