21288911

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{2713}}^1$

素因数の和:2798

約数の個数: 16

約数和(自身を含む): 26054400

約数和(自身を除く): 4765489

約数列:

[1, 7, 19, 59, 133, 413, 1121, 2713, 7847, 18991, 51547, 160067, 360829, 1120469, 3041273, 21288911]

約数ペア:

[(1, 21288911), (7, 3041273), (19, 1120469), (59, 360829), (133, 160067), (413, 51547), (1121, 18991), (2713, 7847)]