21195279

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{17707}}^1$

素因数の和:17739

約数の個数: 24

約数和(自身を含む): 36832640

約数和(自身を除く): 15637361

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 399, 1197, 17707, 53121, 123949, 159363, 336433, 371847, 1009299, 1115541, 2355031, 3027897, 7065093, 21195279]

約数ペア:

[(1, 21195279), (3, 7065093), (7, 3027897), (9, 2355031), (19, 1115541), (21, 1009299), (57, 371847), (63, 336433), (133, 159363), (171, 123949), (399, 53121), (1197, 17707)]